Alarming noises (original) (raw)

Cognition improvement of warning system by complex stimuli in vehicle interior

2010

These days, various safety sensors in vehicles are widespread. And, for warning sounds such as for the trapping prevention of the power slide door of the vehicle, the importance of the warning system for senior citizens, whose audibility characteristic at high frequencies decreases, increases because the warning sound around 4,000Hz is about 25dB different in audibility characteristic between a person in their twenties and in their sixties. Moreover, another issue is that the cognition of direction of the warning sound might be made difficult by the influence of the inside and outside environmental noise, or by the influence of the refraction or the diffraction of sound in the vehicle. In this study, the new methods for the cognition improvement of the warning system and of the specific direction by using the complex stimuli with the auditory sense of sound and the tactile sense of vibration, and by using the complex stimuli with the auditory sense of sound and the visual sense of l...

A Critical Review on the Application and Problems Caused by False Alarms

2018

Emergency evacuation, mock drills, and response collected by detectors and sensors play an important role in averting the risks and disasters. Recent scenario gives the detailing of the false alarm predictions which do affect the general time line of the organization but also create the panic situation which somewhere results in loss of life and property. The use of fire alarms which are also connected with sensors plays an important role in emergency preparedness. Fire alarm work in coordination with detectors and sensors play an effective role as a best response. False Alarm is the result of poor installation, neglect in maintenance, environment, and anthropogenic factors. According to one of the data, Great Britain noticed somewhat 312,000 false alarms in the year 2011–12. The review paper analyzes the trends and latest developments in fire alarms both in industries and residential areas. The paper discusses and gives a critical view of the current problems of fire alarms/false a...

Classifying Alarms: Seeking Durability, Credibility, Consistency, and Simplicity

Biomedical instrumentation & technology, 2017

Alongside the development and testing of new audible alarms intended to support International Electrotechnical Commission 60601-1-8, a global standard concerned with alarm safety, the categories of risk that the standard denotes require further thought and possible updating. In this article, we revisit the origins of the categories covered by the standard. These categories were based on the ways that tissue damage can be caused. We consider these categories from the varied professional perspectives of the authors: human factors, semiotics, clinical practice, and the patient or family (layperson). We conclude that while the categories possess many clinically applicable and defensible features from our range of perspectives, the advances in alarm design now available may allow a more flexible approach. We present a three-tier system with superordinate, basic, and subordinate levels that fit both within the thinking embodied in the current standard and possible new developments.

Alert System for High Speed Vehicles to Avoid Wildlife Accidents

" Alert System for High Speed Vehicles to Avoid Wildlife Accidents " is an alert system used to safeguard our wildlife. We often hear of various accidents of wild animals like elephant, nilgai etc., who are trying to cross the railway track. So, an intelligent electronics system is necessary which can be affixed to avoid the possibilities of accidents. Regarding this, in our project we are using a Passive Infrared Sensor (PIR sensor) which is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view and switches ON any electrical/electronic device to which it is connected to. The key component of the sensor module is the pyro-electric element. All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation is invisible to the human eye because it is radiated at infrared wavelengths, but it is detected by this PIR sensor. This sensor does not radiate any energy for detection purposes and thus, it has no harmful effects on living beings. In our project the PIR sensor is used as a part of a burglar alarm and the electronic in the PIR typically control a small relay. This relay completes the circuit across a pair of electrical contacts connected to a detection input zone of the burglar alarm control panel. The system is usually designed such that if no living creature is being detected, the relay contact is closed-a " normally closed " (NC) relay. If energy emitted from any nearby creature is detected, the relay opens, triggering the alarm, a signal will be directly sent to the driver " s chamber and it will create a message in the LED screen of his chamber also an alarm will be heard which we have implemented using an ultrasonic sensor hc-sr04.