Measurement and computational model of the maximum stable gain in acoustic feedback scenarios

TitleMeasurement and computational model of the maximum stable gain in acoustic feedback scenarios
Publication TypeMaster Thesis
Year of Publication2015
AuthorsPlata Rueda, Á.
AbstractThe behaviour of a sound reinforcement system, such as Public Address (PA) system, can be disturbed by the acoustic feedback phenomenon. In such a system, several microphones and loudspeakers are placed in the same room. When the amplified signal radiated by the loudspeakers goes into the microphones, the system could shows instability. Is then, when it can perceive the phenomenon known as the Larsen effect, or howling effect. The potential of automatic feedback control is the reason of why researches have focused on it during the last years. This research is based on experimental results from acoustics measurements. So, this master thesis proposes a methodology to measure the maximum stable gain (maximum achievable amplification) in a given microphone-loudspeaker-­room scenario just below feedback.
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