Title :
Simulation and implementation of an adaptive howling suppressor for acoustic amplifier
Author :
Zong, Wei ; Guan, Qing ; Yuan, Xi
Author_Institution :
Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
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.
Keywords :
acoustic devices; digital signal processing chips; feedback amplifiers; least mean squares methods; C55 DSP; MATLAB platform; acoustic amplifier; acoustic feedback affects; adaptive howling suppressor; adaptive linear prediction; duplicate adaptation; duplicate-least mean square predictor; virtual environment; Acoustics; Convergence; Digital signal processing; Least squares approximation; Loudspeakers; MATLAB; Microphones; C55; adaptive; howling; least mean square error; simulation;
Conference_Titel :
Computational Problem-Solving (ICCP), 2012 International Conference on
Conference_Location :
Leshan
Print_ISBN :
978-1-4673-1696-5
Electronic_ISBN :
978-1-4673-1695-8
DOI :
10.1109/ICCPS.2012.6384284
