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PARAMETER ANALYSIS IN ACOUSTIC CONTRAST CONTROL DESIGN SCHEME FOR A LOUDSPEAKER ARRAY

BO-HSIEN WU

Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C

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and

GEE-PINN TOO

Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C

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https://doi.org/10.1142/S0218396X12500166Cited by:2 (Source: Crossref)

Abstract

The concept of acoustic contrast control divides a sound field into bright zone and dark zone. A source array is used to increase acoustic potential energy density in the bright zone and to decrease acoustic potential energy density in the dark zone by controlling amplitude and phase of each source. In the present study, a personal audio system which is based on acoustic contrast control is designed. The purpose is to focus the acoustic potential energy around the region of listener. The optimal configuration for sound field is controlled by using a loudspeaker array. Parameters analysis is considered in simulation. Parameters, such as: the quantity of loudspeakers, the spacing of loudspeakers, the length of array, and the emission frequency are discussed. Finally, two experiments are conducted in a semi-anechoic room and a reverberation room, respectively. The results are shown to verify this approach in the present study.

Keywords:

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