Higher order differential-integral microphone arrays

J Acoust Soc Am. 2010 May;127(5):EL227-33. doi: 10.1121/1.3402341.

Abstract

This paper develops theory to design higher order directional microphone arrays. The proposed higher order designs have similar inter sensor spacings as traditional first and second order differential arrays. The Jacobi-Anger expansion is used to exploit the underlying structure of microphone signals from pairs of closely spaced sensors. Specifically, the difference and sum of these microphone signals are processed to design the novel directional array.

MeSH terms

  • Acoustics / instrumentation*
  • Equipment Design
  • Models, Theoretical
  • Noise
  • Signal Processing, Computer-Assisted
  • Sound*
  • Transducers*