Hemanth Shetty - Academia.edu (original) (raw)
Papers by Hemanth Shetty
Hearing, Balance and Communication
Otolaryngology Head and Neck Surgery, 2021
Background: Deep band modulation (DBM) is an envelope enhancement strategy that enhances temporal... more Background: Deep band modulation (DBM) is an envelope enhancement strategy that enhances temporal modulation and may provide a cue for speech understanding among individuals who suffer from temporal processing deficits. Objective: To investigate the effect of deep band modulation on phrase recognition scores at different signal-to-noise ratios (SNRs) among older adults having hearing loss classified as good and poor performers based on temporal resolution ability. Method: Phrase recognition score was obtained for unprocessed and DBM phrases at three SNRs (4, 5, and - 4 dB signal to noise ratio) in 25 (age range 60 to 82 years, mean age 71.48 years) older adults having bilateral mild to moderately severe sloping sensorineural hearing loss. In addition, the gap detection test was also administered to the study participants. Results: A significant better recognition score was obtained in DBM than the unprocessed phrase. The magnitude of improvement from DBM was not the same in all the ...
International Journal of Health Sciences and Research, 2016
Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand... more Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand speech especially, in noise. Hearing aid is one among the rehabilitative option available to them. Even with advent in hearing aid technology, adequate benefit for hearing loss is a colossal challenge. It was hypothesized that channel free hearing aid improves the speech perception in presence of noise. Aim & Objective: To document consonant identification scores (CIS) and sequential transfer of information from multichannel and channel free hearing aids, in noise. Materials and Methods: Fourteen participants having bilateral sloping SNHL were included. Each participant was presented 21 syllables in unaided and aided conditions (4 channels, 12 channels, and channel free hearing aids) at quite, +10 dBSNR and 0dBSNR, to determine CIS and sequential transfer of information. Results: It was observed that signal-processing strategies did not significantly affect consonant identification at q...
International Archives of Otorhinolaryngology
Introduction Older individuals often report that they find it difficulty in enjoying watching tel... more Introduction Older individuals often report that they find it difficulty in enjoying watching television since they find it hard to follow the rapid intensity variations, and voice changes from scene to scene. Objective The present study investigated the effect of coupling the hearing aid with the television via Bluetooth on audiovisual speech recognition and quality rating of compressed speech in older individuals with hearing loss. Method Twenty participants in the age range of 60 to 75 years who had moderate to moderately severe sloping sensorineural hearing loss were bilaterally fitted with digital receiver in the canal hearing aids. The hearing aid was coupled with a television via Bluetooth using a streamer. The video recorded stimuli were presented at 65 dB SPL at normal rate, 35% compression and 45% compression conditions. Speech recognition scores and quality ratings were obtained for each condition with and without the Bluetooth streamer connected to the hearing aids. Resu...
The Journal of International Advanced Otology
BACKGROUND The study investigates the best amplification strategy that provides tinnitus relief i... more BACKGROUND The study investigates the best amplification strategy that provides tinnitus relief in a quiet environment, for individuals with sensorineural hearing loss with bothersome tinnitus. METHODS The repeated measures research design was utilized. Twenty participants (age range 25 years to 65 years; mean: 48.28 years) with bilateral symmetrical sloping sensorineural hearing loss with bothersome unilateral tinnitus were recruited. They were sub-grouped into lowand high-pitched tinnitus groups. A preference score was obtained for each of the strategies in hearing aid fitting, using the paired comparison method. The 4 strategies used were the desired sensation level (input/output) and the National Acoustic Laboratories' nonlinear fitting method (version 1), at each of the low (30 dB SPL) and high (50 dB SPL) compression thresholds. Besides, the severity of tinnitus was assessed using the tinnitus severity index before and after 1 month of using the hearing aid in the best-selected strategy. RESULTS A repeated-measure ANOVA revealed no significant effect of the group on the preference score but was significant for strategies on relief from tinnitus. The desired sensation level (input/output) at a low compression threshold was the best strategy for alleviating tinnitus. Thirty-five percent of the study participants preferred the desired sensation level (input/output) strategy at low and high compression threshold, respectively. The remaining 25% preferred the National Acoustic Laboratories' nonlinear hearing aid (version 1) at low compression threshold, and 5% selected the same device at high compression threshold. Furthermore, a significant association was observed in the severity of tinnitus before and after the hearing aid fitting set at the preferred program. CONCLUSION The desired sensation level (input/output) method at the low compression threshold is the best program to alleviate bothersome tinnitus.
Brazilian journal of otorhinolaryngology, 2021
INTRODUCTION There is a modest relationship between speech perception skills and perceived hearin... more INTRODUCTION There is a modest relationship between speech perception skills and perceived hearing handicap in individuals with hearing loss. In this study, an attempt is made at linking psychoacoustic results and speech perception skills to understand the subjective handicap and quality of life. OBJECTIVE To investigate how speech perception in noise (signal to noise ratio-50), difference limen frequency, temporal modulation transfer function, hearing handicap inventory for adults, and quality of life in auditory neuropathy spectrum disorder differs from sensorineural hearing loss. Further we attempt to discern attributed factors of hearing handicap in auditory neuropathy spectrum disorder and sensorineural hearing loss. METHODS A cross-sectional study with comparative and correlational research designs were utilized. Eighty-four participants were grouped into sensorineural hearing loss (n = 49), and auditory neuropathy spectrum disorder (n = 35) was sub-grouped into mild, moderate...
Noise & Health, 2019
Context: The sentence recognition score and quality of speech differ when hearing aid compression... more Context: The sentence recognition score and quality of speech differ when hearing aid compression is set at different release times at different signal to noise ratios (SNRs) for the normal and compressed rate of sentences. Aims: To investigate the effect of amplitude-compression release time of a hearing aid on sentence recognition and quality judgment: (1) for normal rate and time-compressed sentences (2) in quiet and noisy conditions. Settings and Design: A post-test repeated measures design. Methods and Material: We recruited fifteen adult participants with bilateral sensorineural hearing loss in each group, the younger (35–45 years), and the older ones (60–70 years). A gap detection test assessed temporal processing ability. We used three compression settings, fast-acting, slow-acting, and linear. Sentence recognition and quality and envelope difference index in normal and altered rates were assessed in quiet and in noise at these three compression settings. Statistical analysi...
International journal of pediatric otorhinolaryngology, 2021
OBJECTIVE To investigate phrase perception and subjective quality preference of temporal enhancem... more OBJECTIVE To investigate phrase perception and subjective quality preference of temporal enhancement-based speech processing strategies: Deep-band modulation and Stretching, and hearing aid processed speech in adolescents with late-onset Auditory Neuropathy. METHODS 15 participants with Auditory Neuropathy Spectrum Disorder were involved. Speech perception was assessed using unprocessed, deep-band modulated, stretched, and hearing aid processed conditions. Subjective preference was also assessed using the pair-wise comparison technique. Gap detection test was done using broadband noise to investigate the possible correlation with benefit from processing strategies. RESULTS As a group, no significant benefits were found with processed speech. Clinically relevant trends emerged on subdividing the group into good and poor performers. Deep-band modulation processing was significantly better than unprocessed speech in those with poorer speech recognition abilities. There was a trend for ...
Indian Journal of Otolaryngology and Head & Neck Surgery, 2021
The study aimed to investigate the working memory and speech recognition in noise from individual... more The study aimed to investigate the working memory and speech recognition in noise from individuals with Sensori Neural Hearing Loss (SNHL) with and without auditory neuropathy spectrum disorder (ANSD). The purpose of assessing working memory recommends for a potential intervention program to perceive speech. Twenty participants in the age range of 16–44 years, diagnosed as having mild to moderate SNHL were recruited for the study. The participants were divided into two groups based on the presence and absence of ANSD (10 in each group). The visual working memory was assessed in all the participants using the Operation Span Test, Reading Span Test and Visual Backward Test. Speech perception ability was assessed using the SNR 50 test. There was no significant difference between the scores of Operation Span, Reading Span, and Visual Backward Span for individuals with SNHL with and without ANSD. There was a significant difference between the scores of SNR 50 for individuals with SNHL wi...
The journal of international advanced otology, 2021
OBJECTIVES The objective of the study is to compare amplification strategies on tinnitus relief. ... more OBJECTIVES The objective of the study is to compare amplification strategies on tinnitus relief. A repeated measure research design was used to determine the best strategy that provides a significant relief on tinnitus and improvements in speech perception. METHODS We recruited 20 participants in the age range of 30-60 years (mean age = 47.95 years) having mild to moderately severe sloping sensorineural hearing loss with continuous tonal tinnitus. We grouped the participants into mild and severe, based on the scores obtained in the Tinnitus Handicap Inventory. We evaluated tinnitus pitch and loudness using the adaptive method. Besides, we assessed signal to noise ratio 50 (SNR 50) from each of the programs. We carried out a paired comparison method to determine the best strategy among the 3 in which the maximum preference score was obtained on tinnitus relief by a test hearing aid programmed with 3 programs. RESULTS Each group of participants significantly preferred the strategy for...
Aims and objectives: To evaluate the diagnostic accuracy of Magnetic Resonance Fistulography in t... more Aims and objectives: To evaluate the diagnostic accuracy of Magnetic Resonance Fistulography in the assessment of the perianal fistulae. Background: The success of the surgical approach for perianal fistulae treatmentis closely associated with the preoperative assessment. MR imaging plays a key role in describing the fistulae in relation to the anatomy of the perianal region. This has been categorised according to the involvement of the fistulous tract in relation to the sphincters and its extension of the disease into five imaging based grades. This helps in selecting the appropriate surgery in order to reduce the load of recurrences. Materials and methods: Over a period of 6 months, a cross sectional study was conducted among 18 patients who were admitted with the features of perianal fistulae at Al-Ameen Medical College Hospital , Vijayapura. The average age of patients was 44.5 years, ranging from 33 to 72 years, with the number of females 22.2% (n = 4) and males 77.8% (n = 14)....
An International Journal of Otorhinolaryngology Clinics
https://www.ijhsr.org/IJHSR\_Vol.6\_Issue.3\_March2016/38.pdf, 2016
Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand... more Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand speech especially, in noise. Hearing aid is one among the rehabilitative option available to them. Even with advent in hearing aid technology, adequate benefit for hearing loss is a colossal challenge. It was hypothesized that channel free hearing aid improves the speech perception in presence of noise. Aim & Objective: To document consonant identification scores (CIS) and sequential transfer of information from multichannel and channel free hearing aids, in noise. Materials and Methods: Fourteen participants having bilateral sloping SNHL were included. Each participant was presented 21 syllables in unaided and aided conditions (4 channels, 12 channels, and channel free hearing aids) at quite, +10 dBSNR and 0dBSNR, to determine CIS and sequential transfer of information. Results: It was observed that signal-processing strategies did not significantly affect consonant identification at q...
Journal of Indian Speech Language & Hearing Association
Introduction: Majority of the audiology clinics are not equipped to assess the localization abili... more Introduction: Majority of the audiology clinics are not equipped to assess the localization ability due to the problem in availability of instrument, infrastructure and or cost involvement. Thus, questions from standardized tools sensitive to Indian scenario were selected to assess the localization ability. The objectives of the study were to a) develop Kannada localization questionnaire b) validate the developed questionnaire using degree of error (DOE) and c) investigate the relationship between localization ability from questionnaire and DOE from localization task. Materials and Method: Two experiments were carried out in this study. In Experiment -1 questionnaire was developed by translation, reverse translation and rated for goodness of questionnaire. The developed questionnaire was administered on 103 participants of different age groups from 11-70 years. In Experiment -2 using localization task an aggregated degree of error was measured for the target test stimuli (truck and automobile horns) in the presence of traffic noise at 65 dB SPL and 75 dB SPL. Results: On factor analysis a factorability of correlation suggested 14 of the 17 questions correlated well above 0.3. The questionnaire developed has Cronbach's alpha of 0.78 for 10 items and 0.53 for 4 items. In addition a significant reduction in localization ability on questionnaire and increased error on localization task were observed with advanced in age. Further a moderate negative correlation was noticed between localization ability scores and degree of error. Conclusions: The developed questionnaire can be effectively used in a clinic where there is an unavailability of localization experiment test setup.
Journal of Indian Speech Language & Hearing Association
Context: Sentences are rich in redundancy, and therefore, their identification is often facilitat... more Context: Sentences are rich in redundancy, and therefore, their identification is often facilitated by the context. The use of phrases introduces limited contextual cues into the process of identification and facilitates the evocation of words. Thus, there is a need to develop phrase recognition test to assess identification abilities. Aims: To develop and validate phrase recognition test in Kannada language for assessing speech recognition in noise. Settings and Design: Normative research design was utilized. Subjects and Methods: A total of 70 phrases in Kannada language were constructed and 67 of them were selected based on familiarity rating. Ten participants each in two groups were involved for the list equivalency and validation. Statistical Analysis Used: Repeated measure of analysis of variance was utilized for the lists equivalency and standardization. Results: Sixty-seven phrases were shortlisted from 70 phrases through familiarity rating. These phrases were embedded in different 5 signal to noise ratios (SNRs) (−9 dB SNR to −1 dB SNR in steps of 2 dB). Analysis of results showed 50% recognition score at ~−5 dB SNR. In addition, the phrases that were too easy and too difficult were eliminated. From the remaining phrases, five lists of 10 phrases each were constructed and compared for their equal intelligibility in noise. The results revealed no significant differences across the phrase lists. Conclusions: The homogenous five lists of the Kannada phrase recognition test will be useful to assess identification ability of the listeners and hearing aid benefit.
Indian Journal of Otology
Background: A retrospective research design was used to investigate the effect of degree of heari... more Background: A retrospective research design was used to investigate the effect of degree of hearing loss on speech identification scores (SISs) and aided improvement in individuals with sensorineural hearing loss (SNHL) and auditory neuropathy spectrum disorder (ANSD). The present criteria (PWD Act, 2001) to issue disability certificate is suitable for individuals with SNHL, as there is a good agreement between their degree of hearing loss and speech understanding. In contrast, individuals with ANSD show severe speech understanding problems irrespective of their degree of hearing loss. Despite their problem, there are denied in giving disability certificate. The study also analyzed number of clients who have received the certificate of hearing disability, in both groups. Subjects and Methods: Clinical records of 165 clients who visited the Department of Audiology, All India Institute of Speech and Hearing, Mysore, India between October 2011 and October 2013 were reviewed. Results: Revealed that unlike SNHL, those with ANSD had no relation between the degree of hearing loss and SIS. In addition, aided improvement in ANSD was very limited and was not related to degree of hearing loss. All the individuals with SNHL, who had hearing loss above moderately severe degree received disability certificate. However, only 2 of the 36 clients with ANSD received disability certificate, although their hearing thresholds were above moderately severe degree. Conclusion: Pure-tone thresholds are not a deciding factor of speech understanding in ANSD. Thus, issue of disability certificate for ANSD should be based on SIS rather than pure-tone thresholds.
Noise and Health
Context: Deep band modulation (DBM) improves speech perception in individuals with learning disab... more Context: Deep band modulation (DBM) improves speech perception in individuals with learning disability and older adults, who had temporal impairment in them. However, it is unclear on perception of DBM phrases at quiet and noise conditions in individuals with auditory neuropathy spectrum disorder (ANSD) and sensorineural hearing loss (SNHL), as these individuals suffer from temporal impairment. Aim: The aim is to study the effect of DBM and noise on phrase perception in individuals with normal hearing, SNHL, and ANSD. Settings and Design: A factorial design was used to study deep-band-modulated phrase perception in quiet and at noise. Materials and Methods: Twenty participants in each group (normal, SNHL, and ANSD) were included to assess phrase perception on four lists of each unprocessed (UP) and DBM phrases at different signal-to-noise ratios (SNRs) (−1, −3, and −5 dB SNR), which were presented at most comfortable level. In addition, a temporal processing was determined by gap detection threshold test. Statistical Analysis: A mixed analysis of variance was used to investigate main and interaction effects of conditions, noise, and groups. Further, a Pearson product moment correlation was used to document relationship between phrase perception and temporal processing among study participants in each experimental condition. Results: In each group, a significant improvement was observed in DBM phrase perception over UP phrase recognition in quiet and noise conditions. Although a significant improvement was observed, the benefit of recognition from DBM over UP is negligible at −5 dB SNR in both SNHL and ANSD groups. In addition, as expected, a significant improvement in phrase perception in each condition was found in normal hearing than SNHL followed by ANSD. Further, in both atypical groups, a strong negative correlation was found between phrase perception and gap detection threshold in each of the experimental condition. Conclusion: This is to conclude that temporal envelope cues from DBM were made available for phrase perception in those individuals who have temporal impairment.
Indian Journal of Otology, 2015
Context: In previous studies, the efferent mechanism was speculated on low and high acceptable no... more Context: In previous studies, the efferent mechanism was speculated on low and high acceptable noise level (ANL) groups. Thus, an attempt is made to measure the auditory afferent and efferent mechanisms indirectly through event related potentials on same individuals of different ANL groups. Aims: To study the relationship between behavioral measure ANL and its physiological mechanism. Settings and Design: One shot partly replicative and correlative research design was utilized. Subjects and Methods A total of 40 normal-hearing individuals were classified into low, high and average groups based on ANL. From each study participant the contra-lateral suppression of otoacoustic emission (CSOAE), auditory brainstem response in different fixed levels (50, 55, 60 and 65 dB HL) and also in 5 dB noise above each fixed level of intensity were measured. Kruskal-Wallis test and Pearson correlation statistical analysis were used. Results: The mean amplitude of CSOAE was larger in the lower ANL group than compared to other groups, but this difference was not significant. Further, it was found that the slope of V-A (quiet) in the low ANL group was significantly steeper than the high ANL group (P < 0.05). Similar result was found in slope of V-A (noise) . In addition, the Pearson correlation coefficient result revealed that there was no correlation between global ANL and CSOAE. However, a moderate negative correlation was found between global ANL and the slope of V-A (quiet) and; in slope of V-A (noise) . Conclusion: The slope of V-A in quiet and in noise conditions was found steeper in low ANL group indicating stronger auditory afferent and efferent auditory pathway at the central level.
Hearing, Balance and Communication
Otolaryngology Head and Neck Surgery, 2021
Background: Deep band modulation (DBM) is an envelope enhancement strategy that enhances temporal... more Background: Deep band modulation (DBM) is an envelope enhancement strategy that enhances temporal modulation and may provide a cue for speech understanding among individuals who suffer from temporal processing deficits. Objective: To investigate the effect of deep band modulation on phrase recognition scores at different signal-to-noise ratios (SNRs) among older adults having hearing loss classified as good and poor performers based on temporal resolution ability. Method: Phrase recognition score was obtained for unprocessed and DBM phrases at three SNRs (4, 5, and - 4 dB signal to noise ratio) in 25 (age range 60 to 82 years, mean age 71.48 years) older adults having bilateral mild to moderately severe sloping sensorineural hearing loss. In addition, the gap detection test was also administered to the study participants. Results: A significant better recognition score was obtained in DBM than the unprocessed phrase. The magnitude of improvement from DBM was not the same in all the ...
International Journal of Health Sciences and Research, 2016
Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand... more Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand speech especially, in noise. Hearing aid is one among the rehabilitative option available to them. Even with advent in hearing aid technology, adequate benefit for hearing loss is a colossal challenge. It was hypothesized that channel free hearing aid improves the speech perception in presence of noise. Aim & Objective: To document consonant identification scores (CIS) and sequential transfer of information from multichannel and channel free hearing aids, in noise. Materials and Methods: Fourteen participants having bilateral sloping SNHL were included. Each participant was presented 21 syllables in unaided and aided conditions (4 channels, 12 channels, and channel free hearing aids) at quite, +10 dBSNR and 0dBSNR, to determine CIS and sequential transfer of information. Results: It was observed that signal-processing strategies did not significantly affect consonant identification at q...
International Archives of Otorhinolaryngology
Introduction Older individuals often report that they find it difficulty in enjoying watching tel... more Introduction Older individuals often report that they find it difficulty in enjoying watching television since they find it hard to follow the rapid intensity variations, and voice changes from scene to scene. Objective The present study investigated the effect of coupling the hearing aid with the television via Bluetooth on audiovisual speech recognition and quality rating of compressed speech in older individuals with hearing loss. Method Twenty participants in the age range of 60 to 75 years who had moderate to moderately severe sloping sensorineural hearing loss were bilaterally fitted with digital receiver in the canal hearing aids. The hearing aid was coupled with a television via Bluetooth using a streamer. The video recorded stimuli were presented at 65 dB SPL at normal rate, 35% compression and 45% compression conditions. Speech recognition scores and quality ratings were obtained for each condition with and without the Bluetooth streamer connected to the hearing aids. Resu...
The Journal of International Advanced Otology
BACKGROUND The study investigates the best amplification strategy that provides tinnitus relief i... more BACKGROUND The study investigates the best amplification strategy that provides tinnitus relief in a quiet environment, for individuals with sensorineural hearing loss with bothersome tinnitus. METHODS The repeated measures research design was utilized. Twenty participants (age range 25 years to 65 years; mean: 48.28 years) with bilateral symmetrical sloping sensorineural hearing loss with bothersome unilateral tinnitus were recruited. They were sub-grouped into lowand high-pitched tinnitus groups. A preference score was obtained for each of the strategies in hearing aid fitting, using the paired comparison method. The 4 strategies used were the desired sensation level (input/output) and the National Acoustic Laboratories' nonlinear fitting method (version 1), at each of the low (30 dB SPL) and high (50 dB SPL) compression thresholds. Besides, the severity of tinnitus was assessed using the tinnitus severity index before and after 1 month of using the hearing aid in the best-selected strategy. RESULTS A repeated-measure ANOVA revealed no significant effect of the group on the preference score but was significant for strategies on relief from tinnitus. The desired sensation level (input/output) at a low compression threshold was the best strategy for alleviating tinnitus. Thirty-five percent of the study participants preferred the desired sensation level (input/output) strategy at low and high compression threshold, respectively. The remaining 25% preferred the National Acoustic Laboratories' nonlinear hearing aid (version 1) at low compression threshold, and 5% selected the same device at high compression threshold. Furthermore, a significant association was observed in the severity of tinnitus before and after the hearing aid fitting set at the preferred program. CONCLUSION The desired sensation level (input/output) method at the low compression threshold is the best program to alleviate bothersome tinnitus.
Brazilian journal of otorhinolaryngology, 2021
INTRODUCTION There is a modest relationship between speech perception skills and perceived hearin... more INTRODUCTION There is a modest relationship between speech perception skills and perceived hearing handicap in individuals with hearing loss. In this study, an attempt is made at linking psychoacoustic results and speech perception skills to understand the subjective handicap and quality of life. OBJECTIVE To investigate how speech perception in noise (signal to noise ratio-50), difference limen frequency, temporal modulation transfer function, hearing handicap inventory for adults, and quality of life in auditory neuropathy spectrum disorder differs from sensorineural hearing loss. Further we attempt to discern attributed factors of hearing handicap in auditory neuropathy spectrum disorder and sensorineural hearing loss. METHODS A cross-sectional study with comparative and correlational research designs were utilized. Eighty-four participants were grouped into sensorineural hearing loss (n = 49), and auditory neuropathy spectrum disorder (n = 35) was sub-grouped into mild, moderate...
Noise & Health, 2019
Context: The sentence recognition score and quality of speech differ when hearing aid compression... more Context: The sentence recognition score and quality of speech differ when hearing aid compression is set at different release times at different signal to noise ratios (SNRs) for the normal and compressed rate of sentences. Aims: To investigate the effect of amplitude-compression release time of a hearing aid on sentence recognition and quality judgment: (1) for normal rate and time-compressed sentences (2) in quiet and noisy conditions. Settings and Design: A post-test repeated measures design. Methods and Material: We recruited fifteen adult participants with bilateral sensorineural hearing loss in each group, the younger (35–45 years), and the older ones (60–70 years). A gap detection test assessed temporal processing ability. We used three compression settings, fast-acting, slow-acting, and linear. Sentence recognition and quality and envelope difference index in normal and altered rates were assessed in quiet and in noise at these three compression settings. Statistical analysi...
International journal of pediatric otorhinolaryngology, 2021
OBJECTIVE To investigate phrase perception and subjective quality preference of temporal enhancem... more OBJECTIVE To investigate phrase perception and subjective quality preference of temporal enhancement-based speech processing strategies: Deep-band modulation and Stretching, and hearing aid processed speech in adolescents with late-onset Auditory Neuropathy. METHODS 15 participants with Auditory Neuropathy Spectrum Disorder were involved. Speech perception was assessed using unprocessed, deep-band modulated, stretched, and hearing aid processed conditions. Subjective preference was also assessed using the pair-wise comparison technique. Gap detection test was done using broadband noise to investigate the possible correlation with benefit from processing strategies. RESULTS As a group, no significant benefits were found with processed speech. Clinically relevant trends emerged on subdividing the group into good and poor performers. Deep-band modulation processing was significantly better than unprocessed speech in those with poorer speech recognition abilities. There was a trend for ...
Indian Journal of Otolaryngology and Head & Neck Surgery, 2021
The study aimed to investigate the working memory and speech recognition in noise from individual... more The study aimed to investigate the working memory and speech recognition in noise from individuals with Sensori Neural Hearing Loss (SNHL) with and without auditory neuropathy spectrum disorder (ANSD). The purpose of assessing working memory recommends for a potential intervention program to perceive speech. Twenty participants in the age range of 16–44 years, diagnosed as having mild to moderate SNHL were recruited for the study. The participants were divided into two groups based on the presence and absence of ANSD (10 in each group). The visual working memory was assessed in all the participants using the Operation Span Test, Reading Span Test and Visual Backward Test. Speech perception ability was assessed using the SNR 50 test. There was no significant difference between the scores of Operation Span, Reading Span, and Visual Backward Span for individuals with SNHL with and without ANSD. There was a significant difference between the scores of SNR 50 for individuals with SNHL wi...
The journal of international advanced otology, 2021
OBJECTIVES The objective of the study is to compare amplification strategies on tinnitus relief. ... more OBJECTIVES The objective of the study is to compare amplification strategies on tinnitus relief. A repeated measure research design was used to determine the best strategy that provides a significant relief on tinnitus and improvements in speech perception. METHODS We recruited 20 participants in the age range of 30-60 years (mean age = 47.95 years) having mild to moderately severe sloping sensorineural hearing loss with continuous tonal tinnitus. We grouped the participants into mild and severe, based on the scores obtained in the Tinnitus Handicap Inventory. We evaluated tinnitus pitch and loudness using the adaptive method. Besides, we assessed signal to noise ratio 50 (SNR 50) from each of the programs. We carried out a paired comparison method to determine the best strategy among the 3 in which the maximum preference score was obtained on tinnitus relief by a test hearing aid programmed with 3 programs. RESULTS Each group of participants significantly preferred the strategy for...
Aims and objectives: To evaluate the diagnostic accuracy of Magnetic Resonance Fistulography in t... more Aims and objectives: To evaluate the diagnostic accuracy of Magnetic Resonance Fistulography in the assessment of the perianal fistulae. Background: The success of the surgical approach for perianal fistulae treatmentis closely associated with the preoperative assessment. MR imaging plays a key role in describing the fistulae in relation to the anatomy of the perianal region. This has been categorised according to the involvement of the fistulous tract in relation to the sphincters and its extension of the disease into five imaging based grades. This helps in selecting the appropriate surgery in order to reduce the load of recurrences. Materials and methods: Over a period of 6 months, a cross sectional study was conducted among 18 patients who were admitted with the features of perianal fistulae at Al-Ameen Medical College Hospital , Vijayapura. The average age of patients was 44.5 years, ranging from 33 to 72 years, with the number of females 22.2% (n = 4) and males 77.8% (n = 14)....
An International Journal of Otorhinolaryngology Clinics
https://www.ijhsr.org/IJHSR\_Vol.6\_Issue.3\_March2016/38.pdf, 2016
Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand... more Introduction: Older adults with sensorineural hearing loss (SNHL) find it difficult to understand speech especially, in noise. Hearing aid is one among the rehabilitative option available to them. Even with advent in hearing aid technology, adequate benefit for hearing loss is a colossal challenge. It was hypothesized that channel free hearing aid improves the speech perception in presence of noise. Aim & Objective: To document consonant identification scores (CIS) and sequential transfer of information from multichannel and channel free hearing aids, in noise. Materials and Methods: Fourteen participants having bilateral sloping SNHL were included. Each participant was presented 21 syllables in unaided and aided conditions (4 channels, 12 channels, and channel free hearing aids) at quite, +10 dBSNR and 0dBSNR, to determine CIS and sequential transfer of information. Results: It was observed that signal-processing strategies did not significantly affect consonant identification at q...
Journal of Indian Speech Language & Hearing Association
Introduction: Majority of the audiology clinics are not equipped to assess the localization abili... more Introduction: Majority of the audiology clinics are not equipped to assess the localization ability due to the problem in availability of instrument, infrastructure and or cost involvement. Thus, questions from standardized tools sensitive to Indian scenario were selected to assess the localization ability. The objectives of the study were to a) develop Kannada localization questionnaire b) validate the developed questionnaire using degree of error (DOE) and c) investigate the relationship between localization ability from questionnaire and DOE from localization task. Materials and Method: Two experiments were carried out in this study. In Experiment -1 questionnaire was developed by translation, reverse translation and rated for goodness of questionnaire. The developed questionnaire was administered on 103 participants of different age groups from 11-70 years. In Experiment -2 using localization task an aggregated degree of error was measured for the target test stimuli (truck and automobile horns) in the presence of traffic noise at 65 dB SPL and 75 dB SPL. Results: On factor analysis a factorability of correlation suggested 14 of the 17 questions correlated well above 0.3. The questionnaire developed has Cronbach's alpha of 0.78 for 10 items and 0.53 for 4 items. In addition a significant reduction in localization ability on questionnaire and increased error on localization task were observed with advanced in age. Further a moderate negative correlation was noticed between localization ability scores and degree of error. Conclusions: The developed questionnaire can be effectively used in a clinic where there is an unavailability of localization experiment test setup.
Journal of Indian Speech Language & Hearing Association
Context: Sentences are rich in redundancy, and therefore, their identification is often facilitat... more Context: Sentences are rich in redundancy, and therefore, their identification is often facilitated by the context. The use of phrases introduces limited contextual cues into the process of identification and facilitates the evocation of words. Thus, there is a need to develop phrase recognition test to assess identification abilities. Aims: To develop and validate phrase recognition test in Kannada language for assessing speech recognition in noise. Settings and Design: Normative research design was utilized. Subjects and Methods: A total of 70 phrases in Kannada language were constructed and 67 of them were selected based on familiarity rating. Ten participants each in two groups were involved for the list equivalency and validation. Statistical Analysis Used: Repeated measure of analysis of variance was utilized for the lists equivalency and standardization. Results: Sixty-seven phrases were shortlisted from 70 phrases through familiarity rating. These phrases were embedded in different 5 signal to noise ratios (SNRs) (−9 dB SNR to −1 dB SNR in steps of 2 dB). Analysis of results showed 50% recognition score at ~−5 dB SNR. In addition, the phrases that were too easy and too difficult were eliminated. From the remaining phrases, five lists of 10 phrases each were constructed and compared for their equal intelligibility in noise. The results revealed no significant differences across the phrase lists. Conclusions: The homogenous five lists of the Kannada phrase recognition test will be useful to assess identification ability of the listeners and hearing aid benefit.
Indian Journal of Otology
Background: A retrospective research design was used to investigate the effect of degree of heari... more Background: A retrospective research design was used to investigate the effect of degree of hearing loss on speech identification scores (SISs) and aided improvement in individuals with sensorineural hearing loss (SNHL) and auditory neuropathy spectrum disorder (ANSD). The present criteria (PWD Act, 2001) to issue disability certificate is suitable for individuals with SNHL, as there is a good agreement between their degree of hearing loss and speech understanding. In contrast, individuals with ANSD show severe speech understanding problems irrespective of their degree of hearing loss. Despite their problem, there are denied in giving disability certificate. The study also analyzed number of clients who have received the certificate of hearing disability, in both groups. Subjects and Methods: Clinical records of 165 clients who visited the Department of Audiology, All India Institute of Speech and Hearing, Mysore, India between October 2011 and October 2013 were reviewed. Results: Revealed that unlike SNHL, those with ANSD had no relation between the degree of hearing loss and SIS. In addition, aided improvement in ANSD was very limited and was not related to degree of hearing loss. All the individuals with SNHL, who had hearing loss above moderately severe degree received disability certificate. However, only 2 of the 36 clients with ANSD received disability certificate, although their hearing thresholds were above moderately severe degree. Conclusion: Pure-tone thresholds are not a deciding factor of speech understanding in ANSD. Thus, issue of disability certificate for ANSD should be based on SIS rather than pure-tone thresholds.
Noise and Health
Context: Deep band modulation (DBM) improves speech perception in individuals with learning disab... more Context: Deep band modulation (DBM) improves speech perception in individuals with learning disability and older adults, who had temporal impairment in them. However, it is unclear on perception of DBM phrases at quiet and noise conditions in individuals with auditory neuropathy spectrum disorder (ANSD) and sensorineural hearing loss (SNHL), as these individuals suffer from temporal impairment. Aim: The aim is to study the effect of DBM and noise on phrase perception in individuals with normal hearing, SNHL, and ANSD. Settings and Design: A factorial design was used to study deep-band-modulated phrase perception in quiet and at noise. Materials and Methods: Twenty participants in each group (normal, SNHL, and ANSD) were included to assess phrase perception on four lists of each unprocessed (UP) and DBM phrases at different signal-to-noise ratios (SNRs) (−1, −3, and −5 dB SNR), which were presented at most comfortable level. In addition, a temporal processing was determined by gap detection threshold test. Statistical Analysis: A mixed analysis of variance was used to investigate main and interaction effects of conditions, noise, and groups. Further, a Pearson product moment correlation was used to document relationship between phrase perception and temporal processing among study participants in each experimental condition. Results: In each group, a significant improvement was observed in DBM phrase perception over UP phrase recognition in quiet and noise conditions. Although a significant improvement was observed, the benefit of recognition from DBM over UP is negligible at −5 dB SNR in both SNHL and ANSD groups. In addition, as expected, a significant improvement in phrase perception in each condition was found in normal hearing than SNHL followed by ANSD. Further, in both atypical groups, a strong negative correlation was found between phrase perception and gap detection threshold in each of the experimental condition. Conclusion: This is to conclude that temporal envelope cues from DBM were made available for phrase perception in those individuals who have temporal impairment.
Indian Journal of Otology, 2015
Context: In previous studies, the efferent mechanism was speculated on low and high acceptable no... more Context: In previous studies, the efferent mechanism was speculated on low and high acceptable noise level (ANL) groups. Thus, an attempt is made to measure the auditory afferent and efferent mechanisms indirectly through event related potentials on same individuals of different ANL groups. Aims: To study the relationship between behavioral measure ANL and its physiological mechanism. Settings and Design: One shot partly replicative and correlative research design was utilized. Subjects and Methods A total of 40 normal-hearing individuals were classified into low, high and average groups based on ANL. From each study participant the contra-lateral suppression of otoacoustic emission (CSOAE), auditory brainstem response in different fixed levels (50, 55, 60 and 65 dB HL) and also in 5 dB noise above each fixed level of intensity were measured. Kruskal-Wallis test and Pearson correlation statistical analysis were used. Results: The mean amplitude of CSOAE was larger in the lower ANL group than compared to other groups, but this difference was not significant. Further, it was found that the slope of V-A (quiet) in the low ANL group was significantly steeper than the high ANL group (P < 0.05). Similar result was found in slope of V-A (noise) . In addition, the Pearson correlation coefficient result revealed that there was no correlation between global ANL and CSOAE. However, a moderate negative correlation was found between global ANL and the slope of V-A (quiet) and; in slope of V-A (noise) . Conclusion: The slope of V-A in quiet and in noise conditions was found steeper in low ANL group indicating stronger auditory afferent and efferent auditory pathway at the central level.