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Related Experiment Video

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CABE: A Cloud-Based Acoustic Beamforming Emulator for FPGA-Based Sound Source Localization.

Laurent Segers1, Jurgen Vandendriessche2, Thibaut Vandervelden2

  • 1Department of Engineering Technology (INDI), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium. laurent.segers@vub.be.

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Summary

A new Cloud-based Acoustic Beamforming Emulator (CABE) accounts for non-ideal microphone characteristics in array design. This tool aids in implementing beamforming algorithms on embedded hardware and visualizing results.

Keywords:
CABEFPGA microphone array beamforming emulatorcloud-based acoustic beamforming emulatordelay-and-sum cloud-based emulatormicrophone array beamforming

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Area of Science:

  • Acoustics
  • Signal Processing
  • Computer Engineering

Background:

  • Microphone arrays are increasingly popular for applications like sonar and speech recognition.
  • Existing tools often assume ideal microphone responses, neglecting real-world non-ideal characteristics.
  • There is a lack of tools for designing microphone arrays with non-ideal characteristics and generating hardware implementation packages.

Purpose of the Study:

  • To propose a scalable Cloud-based Acoustic Beamforming Emulator (CABE).
  • To address the limitations of existing tools by incorporating non-ideal microphone properties.
  • To facilitate the design, implementation, and visualization of acoustic beamforming systems.

Main Methods:

  • Developed a cloud-based platform for acoustic beamforming emulation.
  • Incorporated non-ideal microphone characteristics into the emulation computations.
  • Enabled generation of hardware description language packages for embedded systems.
  • Integrated a client application for 2D/3D visualization of results.

Main Results:

  • CABE successfully emulates acoustic beamforming considering non-ideal microphone responses.
  • Validated emulation results with real-world acoustic data from microphone arrays.
  • Generated hardware description language packages for Delay-and-Sum beamformers.
  • Provided visualization tools for beamforming results, performance metrics, and error analysis.

Conclusions:

  • CABE offers a comprehensive solution for designing and implementing acoustic beamforming systems.
  • The emulator accounts for real-world microphone imperfections, improving design accuracy.
  • Facilitates practical implementation on Field Programmable Gate Arrays and offers advanced visualization capabilities.