Development of a Portable Acoustic Beamformer using FPGA Technology and Digital Microphones

Paper #:
  • 2015-01-2246

Published:
  • 2015-06-15
Citation:
Veggeberg, K. and Denton, M., "Development of a Portable Acoustic Beamformer using FPGA Technology and Digital Microphones," SAE Technical Paper 2015-01-2246, 2015, https://doi.org/10.4271/2015-01-2246.
Pages:
4
Abstract:
This is an overview of the development of a portable, real-time acoustic beamformer based on FPGA (Field Programmable Gate Arrays) and digital microphones for noise source identification. Microphone arrays can be a useful tool in identifying noise sources and give designers an image of noise distribution.The beamforming algorithm is a classic and efficient algorithm for signal processing of microphone arrays and is the core of many microphone array systems. High-speed real-time beamforming has not been implemented much in a portable instrument because it requires large computational resources. Utilizing a beamforming algorithm running on a Field Programmable Gate Array (FPGA), this camera is able to detect and locate both stationary and moving noise sources. A high-resolution optical camera located in the middle of the device records images at a rate of 25 frames per second. The use of the FPGA technology and digital microphones provides increased performance, reduced cost and weight.
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