Sound Reproduction with a Circular Loudspeaker Array Using Differential Beamforming Method
- Resource Type
- Conference
- Authors
- Zhang, Yankai; Mao, Jiayi; Cai, Yefeng; Ye, Chao
- Source
- 2022 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC) Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), 2022 Asia-Pacific. :143-148 Nov, 2022
- Subject
- Communication, Networking and Broadcast Technologies
Computing and Processing
Signal Processing and Analysis
Loudspeakers
Jacobian matrices
Array signal processing
Simulation
Design methodology
Information processing
White noise
- Language
- ISSN
- 2640-0103
This paper proposes an approach to get frequency invariant, symmetric beampattern using a compact circular loudspeaker array. The Jacobi-Anger expansion method is used to approximate the target beampattern. The simulated performance is compared of the same circular loudspeaker array with and without a rigid baffle. The analytical solution of the weight and the simulation results show that the circular loudspeaker array with a rigid baffle can overcome the null problem confronting the array without a rigid baffle. The minimum-norm filter is used to improve the robustness of the system and maintain the frequency-invariant beampattern over the frequency range of interest.