E. Armelloni | University of Parma (original) (raw)

Papers by E. Armelloni

2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA), 2021

The Italian Opera theatres are always subject to scientific studies that try to investigate as de... more The Italian Opera theatres are always subject to scientific studies that try to investigate as deeply as possible this historical heritage to preserve the architectural and acoustical information for future generations. This paper deals with two ways of data representations based on the outcomes derived from the variety of equipment used during the measurements. In particular, a methodology in line with standards and regulations has been introduced to representing the graphs of the main acoustical parameters; besides, a video of the real-time room impulse response (RIR) has been snapped with a few shots in place of visualizing the sound reflections that occurred inside the entire volume. After a brief description of the historical background of the Municipal theatre of Piacenza, the authors introduce the two methods just discussed to highlight the completeness of data representation regarding any type of room that is intended to be analyzed acoustically.

Proceedings of the ICA congress, 2019

2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA), 2021

The investigation of the acoustics inside the Italian Opera theatres has been undertaken by schol... more The investigation of the acoustics inside the Italian Opera theatres has been undertaken by scholars in order to deepening their scientific studies on the architectural and cultural heritage. This paper deals with alternative ways of how to represent acoustic data, in particular by adding a 3dof representation of the impulse response (IR) besides the graphs related to the main acoustic parameters in line with the standard requirements. The 3dof screen shots have been undertaken by an overlay elaboration, showing the particular architectural components of the theatre that contribute to the early and late sound reflections. A brief introduction of the historical background related to the Comunale-Pavarotti theatre of Modena has been given to understand the architectural characteristics of the entire structure.

Implementation of cross-talk canceling filters with warped structures-

The recent concern about the impact of underwater n oise emitted by ships, pushed national and in... more The recent concern about the impact of underwater n oise emitted by ships, pushed national and international bodies to face the problem of setting l mits to ship noise emission. In order to set new limits, a deep knowledge of the three elements of he noise chain (i.e. source, transmission path and receiver) is needed. In this context it is therefore important to measure the acoustic signature of a ship, in order to characterize it as no i e source. To this aim, dedicated measurements may be carried out during sea trials, which usually takes place in an area close to the building shipyard. The measurement layout foresees a series of hydrophones deployed in the water column placed at a distance of a hundred metres from the s hip that passes abeam the hydrophones on a straight course. Such far field measurements are to b referred to the reference distance of 1 metre in order to ensure results comparability. Sound pro pagation from the ship to the hydrophones is therefore to be carefull...

Applied Ocean Research, 2019

ABSTRACT 1. Il teatro (da [1]) Il Teatro alla Scala di Milano, citato spesso semplicemente come L... more ABSTRACT 1. Il teatro (da [1]) Il Teatro alla Scala di Milano, citato spesso semplicemente come La Scala, oltre ad essere uno dei teatri più famosi al mondo è conosciuto come "il tempio della lirica"; si-tuato in una delle piazze maggiormente frequentate ed eleganti della città, l'omoni-ma Piazza della Scala, dalla quale prende appunto il nome. L'attuale stagione teatrale, uno dei più importanti eventi della vita culturale milanese, è composta da opera liri-ca, balletto e concerti di musica classica. Figura 1 – Sala e facciata del Teatro La Scala 1.1 La storia Il teatro della Scala fu fondato per volere dell'imperatrice Maria Teresa d'Austria dopo l'incendio che nel 1776 (il 26 febbraio) distrusse il Teatro Regio Ducale di Mila-no, che fino a quel momento ospitava l'opera lirica. Le spese per l'edificazione del nuo-vo teatro furono sostenute dai proprietari dei palchi del Teatro Regio Ducale in cambio del rinnovo della proprietà dei palchi.

ABSTRACT 1. Il teatro (da [1,2]) Il Teatro Municipale di Reggio Emilia, intitolato oggi a Romolo ... more ABSTRACT 1. Il teatro (da [1,2]) Il Teatro Municipale di Reggio Emilia, intitolato oggi a Romolo Valli, sorge su una delle più importanti piazze cittadine, sulla quale si affacciano l'altro teatro cittadino, il Teatro Ariosto, la Galleria San Rocco e i Giardini Pubblici. Il Teatro Municipale è un teatro d'opera e concerti. Figura 1 – Sala e facciata del Teatro Valli – la foto della sala si riferisce alle manifesta-zioni per il 150° della Unita' d'Italia 1.1 La storia L'edificio teatrale è stato costruito negli anni 1852-1857. Fu ideato e condotto a ter-mine dall'architetto Cesare Costa di Modena e i lavori furono diretti dall'ingegnere An-tonio Tegani di Reggio. Presenta una facciata neoclassica su due ordini, in laterizio e marmo, con colonne tuscaniche al piano terra e paraste ioniche al primo piano. Sulla trabeazione sono poste statue allegoriche. La sala interna si presenta come un tradizio-nale teatro d'opera italiano, con pianta a ferro di cavallo e cinque ordini di palchi.

Journal of The Audio Engineering Society, 2005

Audio reproduction of a movie inside a not dedicated room is critical; setting an ITU 5.1 system ... more Audio reproduction of a movie inside a not dedicated room is critical; setting an ITU 5.1 system at home, for example, requires to place a large number of speakers around the room. But positions of speakers are often conditioned by the furniture. Bad alignment reduces spatial performances of the system dramatically. For circumventing the above problems, most stereo TV sets, nowadays, are equipped with some form of “virtual surround” reproduction, employing substantially the Stereo Dipole method. This provides a very good frontal sound stage, but indeed sucks regarding the emulation of virtual surround loudspeakers. An alternative reproduction technique is PanAmbio 4.1, based on a double stereo dipole system (frontal and rear). In this work the authors propose a comparison between the standard 5-ways surround system, and the new one. Validation is performed by subjective tests inside a domestic room.

one of the reasons to use a non-uniform linear arr ay (NULA) is to reduce the cost and complexity... more one of the reasons to use a non-uniform linear arr ay (NULA) is to reduce the cost and complexity of the array, since it can have fewer sensors than an ULA system. In this paper, authors describe the construction of a low-cost, ten-hydrophones, nonuniform linear array to be employed in passive and ctive sonar applications. Many experiments were conducted, under controlled c onditions (large pool), oriented to characterize both individual transducers as well as the complete array. Using the array in “passive” mode, employing an omnidirectional sound source and a non-impulsive signal, beamforming and inverse filtering techniques, the a uthors evaluated array directivity over a wide range of frequencies (1-23 kHz) and also its capability to estimate the direction of

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2015

ABSTRACT In present work, an acoustic characterisation of the University of Genoa cavitation tunn... more ABSTRACT In present work, an acoustic characterisation of the University of Genoa cavitation tunnel is presented, with the aim to obtain suitable transfer functions in order to take into account (at least partially) the effects of the confined environment, particularly important for small-scale facility like the one considered. The acoustic characterisation is performed considering two hydrophones in significantly different positions (inside the tunnel and in an external tank), typical, for different reasons, of noise measurements in cavitation tunnel; the procedure is based on the logarithmic sine sweep signal. The obtained transfer functions have been applied to a series of measurements of model propellers in correspondence to considerably different functioning conditions, in terms of cavitation number and propeller loading, showing the applicability of the procedure and the improvement of the measurement quality, in view of predictions in full scale.

2003 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (IEEE Cat. No.03TH8684), 2003

2000 Digest of Technical Papers. International Conference on Consumer Electronics. Nineteenth in the Series (Cat. No.00CH37102), 2000

2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA), 2021

The Italian Opera theatres are always subject to scientific studies that try to investigate as de... more The Italian Opera theatres are always subject to scientific studies that try to investigate as deeply as possible this historical heritage to preserve the architectural and acoustical information for future generations. This paper deals with two ways of data representations based on the outcomes derived from the variety of equipment used during the measurements. In particular, a methodology in line with standards and regulations has been introduced to representing the graphs of the main acoustical parameters; besides, a video of the real-time room impulse response (RIR) has been snapped with a few shots in place of visualizing the sound reflections that occurred inside the entire volume. After a brief description of the historical background of the Municipal theatre of Piacenza, the authors introduce the two methods just discussed to highlight the completeness of data representation regarding any type of room that is intended to be analyzed acoustically.

Proceedings of the ICA congress, 2019

2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA), 2021

The investigation of the acoustics inside the Italian Opera theatres has been undertaken by schol... more The investigation of the acoustics inside the Italian Opera theatres has been undertaken by scholars in order to deepening their scientific studies on the architectural and cultural heritage. This paper deals with alternative ways of how to represent acoustic data, in particular by adding a 3dof representation of the impulse response (IR) besides the graphs related to the main acoustic parameters in line with the standard requirements. The 3dof screen shots have been undertaken by an overlay elaboration, showing the particular architectural components of the theatre that contribute to the early and late sound reflections. A brief introduction of the historical background related to the Comunale-Pavarotti theatre of Modena has been given to understand the architectural characteristics of the entire structure.

Implementation of cross-talk canceling filters with warped structures-

The recent concern about the impact of underwater n oise emitted by ships, pushed national and in... more The recent concern about the impact of underwater n oise emitted by ships, pushed national and international bodies to face the problem of setting l mits to ship noise emission. In order to set new limits, a deep knowledge of the three elements of he noise chain (i.e. source, transmission path and receiver) is needed. In this context it is therefore important to measure the acoustic signature of a ship, in order to characterize it as no i e source. To this aim, dedicated measurements may be carried out during sea trials, which usually takes place in an area close to the building shipyard. The measurement layout foresees a series of hydrophones deployed in the water column placed at a distance of a hundred metres from the s hip that passes abeam the hydrophones on a straight course. Such far field measurements are to b referred to the reference distance of 1 metre in order to ensure results comparability. Sound pro pagation from the ship to the hydrophones is therefore to be carefull...

Applied Ocean Research, 2019

ABSTRACT 1. Il teatro (da [1]) Il Teatro alla Scala di Milano, citato spesso semplicemente come L... more ABSTRACT 1. Il teatro (da [1]) Il Teatro alla Scala di Milano, citato spesso semplicemente come La Scala, oltre ad essere uno dei teatri più famosi al mondo è conosciuto come "il tempio della lirica"; si-tuato in una delle piazze maggiormente frequentate ed eleganti della città, l'omoni-ma Piazza della Scala, dalla quale prende appunto il nome. L'attuale stagione teatrale, uno dei più importanti eventi della vita culturale milanese, è composta da opera liri-ca, balletto e concerti di musica classica. Figura 1 – Sala e facciata del Teatro La Scala 1.1 La storia Il teatro della Scala fu fondato per volere dell'imperatrice Maria Teresa d'Austria dopo l'incendio che nel 1776 (il 26 febbraio) distrusse il Teatro Regio Ducale di Mila-no, che fino a quel momento ospitava l'opera lirica. Le spese per l'edificazione del nuo-vo teatro furono sostenute dai proprietari dei palchi del Teatro Regio Ducale in cambio del rinnovo della proprietà dei palchi.

ABSTRACT 1. Il teatro (da [1,2]) Il Teatro Municipale di Reggio Emilia, intitolato oggi a Romolo ... more ABSTRACT 1. Il teatro (da [1,2]) Il Teatro Municipale di Reggio Emilia, intitolato oggi a Romolo Valli, sorge su una delle più importanti piazze cittadine, sulla quale si affacciano l'altro teatro cittadino, il Teatro Ariosto, la Galleria San Rocco e i Giardini Pubblici. Il Teatro Municipale è un teatro d'opera e concerti. Figura 1 – Sala e facciata del Teatro Valli – la foto della sala si riferisce alle manifesta-zioni per il 150° della Unita' d'Italia 1.1 La storia L'edificio teatrale è stato costruito negli anni 1852-1857. Fu ideato e condotto a ter-mine dall'architetto Cesare Costa di Modena e i lavori furono diretti dall'ingegnere An-tonio Tegani di Reggio. Presenta una facciata neoclassica su due ordini, in laterizio e marmo, con colonne tuscaniche al piano terra e paraste ioniche al primo piano. Sulla trabeazione sono poste statue allegoriche. La sala interna si presenta come un tradizio-nale teatro d'opera italiano, con pianta a ferro di cavallo e cinque ordini di palchi.

Journal of The Audio Engineering Society, 2005

Audio reproduction of a movie inside a not dedicated room is critical; setting an ITU 5.1 system ... more Audio reproduction of a movie inside a not dedicated room is critical; setting an ITU 5.1 system at home, for example, requires to place a large number of speakers around the room. But positions of speakers are often conditioned by the furniture. Bad alignment reduces spatial performances of the system dramatically. For circumventing the above problems, most stereo TV sets, nowadays, are equipped with some form of “virtual surround” reproduction, employing substantially the Stereo Dipole method. This provides a very good frontal sound stage, but indeed sucks regarding the emulation of virtual surround loudspeakers. An alternative reproduction technique is PanAmbio 4.1, based on a double stereo dipole system (frontal and rear). In this work the authors propose a comparison between the standard 5-ways surround system, and the new one. Validation is performed by subjective tests inside a domestic room.

one of the reasons to use a non-uniform linear arr ay (NULA) is to reduce the cost and complexity... more one of the reasons to use a non-uniform linear arr ay (NULA) is to reduce the cost and complexity of the array, since it can have fewer sensors than an ULA system. In this paper, authors describe the construction of a low-cost, ten-hydrophones, nonuniform linear array to be employed in passive and ctive sonar applications. Many experiments were conducted, under controlled c onditions (large pool), oriented to characterize both individual transducers as well as the complete array. Using the array in “passive” mode, employing an omnidirectional sound source and a non-impulsive signal, beamforming and inverse filtering techniques, the a uthors evaluated array directivity over a wide range of frequencies (1-23 kHz) and also its capability to estimate the direction of

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2015

ABSTRACT In present work, an acoustic characterisation of the University of Genoa cavitation tunn... more ABSTRACT In present work, an acoustic characterisation of the University of Genoa cavitation tunnel is presented, with the aim to obtain suitable transfer functions in order to take into account (at least partially) the effects of the confined environment, particularly important for small-scale facility like the one considered. The acoustic characterisation is performed considering two hydrophones in significantly different positions (inside the tunnel and in an external tank), typical, for different reasons, of noise measurements in cavitation tunnel; the procedure is based on the logarithmic sine sweep signal. The obtained transfer functions have been applied to a series of measurements of model propellers in correspondence to considerably different functioning conditions, in terms of cavitation number and propeller loading, showing the applicability of the procedure and the improvement of the measurement quality, in view of predictions in full scale.

2003 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (IEEE Cat. No.03TH8684), 2003

2000 Digest of Technical Papers. International Conference on Consumer Electronics. Nineteenth in the Series (Cat. No.00CH37102), 2000