Zhao Sipei, Qiu Xiaojun, Burnett Ian
Key Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, 22 Hankou Road Gulou District, Nanjing 210093, China.
School of Electrical and Computer Engineering, RMIT University, Building 10, Level 9, Swanston Street, Melbourne 3000, Australia.
J Acoust Soc Am. 2015 Feb;137(2):1036-9. doi: 10.1121/1.4906184.
This paper proposes a method of creating acoustic contrast control in an arc-shaped area using a linear loudspeaker array. The boundary of the arc-shaped area is treated as the envelope of the tangent lines that can be formed by manipulating the phase profile of the loudspeakers in the array. When compared with the existing acoustic contrast control method, the proposed method is able to generate sound field inside an arc-shaped area and achieve a trade-off between acoustic uniformity and acoustic contrast. The acoustic contrast created by the proposed method increases while the acoustic uniformity decreases with frequency.
