On Acoustic Modeling for Broadband Beamforming
- Resource Type
- Conference
- Authors
- Chhetri, Amit; Mansour, Mohamed; Kim, Wontak; Pan, Guangdong
- Source
- 2019 27th European Signal Processing Conference (EUSIPCO) Signal Processing Conference (EUSIPCO), 2019 27th European. :1-5 Sep, 2019
- Subject
- Communication, Networking and Broadcast Technologies
Computing and Processing
Signal Processing and Analysis
Mathematical model
Microphone arrays
Acoustics
Array signal processing
Finite element analysis
Broadband communication
Beamforming
Microphone Arrays
FEM
Wave Equation.
- Language
- ISSN
- 2076-1465
In this work, we describe limitations of the free-field propagation model for designing broadband beamformers for microphone arrays on a rigid surface. Towards this goal, we describe a general frame-work for quantifying the microphone array performance in a general wave-field by directly solving the acoustic wave equation. The model utilizes Finite-Element-Method (FEM) for evaluating the response of the microphone array surface to background 3D planar and spherical waves. The effectiveness of the framework is established by designing and evaluating a representative broadband beamformer under realistic acoustic conditions.