Acoustic Feedback Cancellation For Public Address Systems
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چکیده
منابع مشابه
Analysis, Design, and Evaluation of Acoustic Feedback Cancellation Systems for Hearing Aids - A Novel Approach to Unbiased Feedback Estimation
Acoustic feedback problems occur when the output loudspeaker signal of an audio system is partly returned to the input microphone via an acoustic coupling through the air. This problem often causes significant performance degradations in applications such as public address systems and hearing aids. In the worst case, the audio system becomes unstable and howling occurs. In this work, first we a...
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Double-talk (DT)-robust acoustic echo cancellation (AEC) and acoustic feedback cancellation (AFC) are needed in speech communication systems, e.g., in hands-free communication systems and hearing aids. In this paper, we derive a practical and computationally efficient algorithm based on the frequency-domain adaptive filter prediction error method using row operations (FDAF-PEM-AFROW) for DT-rob...
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In this work we evaluate four state-of-the-art acoustic feedback cancellation systems for hearing aid applications. We show that significant improvements in cancellation performance can be made over traditional systems by allowing small alterations in the loudspeaker signal and a computational complexity increase by a factor of 2 − 3. The evaluation is based on a listening test and objective as...
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Passengers communication inside a car can be improved by using a speech reinforcement system. This system picks up the speech of each passenger, amplifies it and plays it back into the cabin through the loudspeakers of the car. Due to the electro-acoustic coupling between loudspeakers and microphones, a closed-loop system is created. To avoid the risk of instability due to the acoustic feedback...
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تاریخ انتشار 2005