Acoustic Feedback Effect Reduction Based on Path Compensation in Multichannel FXLMS Sound Inhibition Systems

This paper investigates the issues of acoustic feedback in a new kind of application, sound inhibition (SI) system, which is based on the multiple channel active noise control (ANC) technique and implemented by using Filtered-X Least Mean Square (FXLMS) algorithm. The presence of acoustic feedback degrades the performance of SI system, and in the worst case the SI system may be unstable. Here we propose a method based on path compensation through feedback path modeling to complete the acoustic feedback effect reduction (FBER). Computer simulations are carried out for a 1×2×2 system consists of one reference microphone, two loudspeakers and two error microphones. It is demonstrated that the proposed method achieves better performance than the existing method.