Simulation and implementation of an adaptive howling suppressor for acoustic amplifier

摘要

Howling phenomenon caused by acoustic feedback affects the working of an amplifier system. The adaptive linear prediction proved to be effective for howling suppression. In this paper, we proposed a MATLAB platform that provides a virtual environment for the simulation of adaptive howling suppressor (AHS). We improved the system performance by duplicate adaptation. The duplicate-Least Mean Square predictor was finally implemented on a C55 DSP and evaluation of the AHS was carried out.