Sound pickup in the presence of diffraction effects

Authors

  • Michael R. Stinson Inst for Microstructural Sciences, Ottawa, Canada
  • James G. Ryan Inst for Microstructural Sciences, Ottawa, Canada
  • Gilles Daigle Inst for Microstructural Sciences, Ottawa, Canada

Keywords:

Acoustic wave diffraction, Computational methods, Computer monitors, Microphones, Signal receivers, Sound pressure level (SPL)

Abstract

The variability of sound pressure level (SPL) due to diffraction is examined. Calculations show the considerable variation in SPL near the vertex of a right-angled wedge. For a device such as a computer monitor, different microphone locations can lead to differences of several dB, particularly at higher frequencies. When a directional receiver with two ports is used, account must be made of possible differences in the received signal strength or the assumed directionality could be lost. Similarly, for an array of receivers, the effects of diffraction at each receiver location must be determined to ensure effective beamforming and the desired performance.

Published

1998-09-01

How to Cite

1.
Stinson MR, Ryan JG, Daigle G. Sound pickup in the presence of diffraction effects. Canadian Acoustics [Internet]. 1998Sep.1 [cited 2021Jun.25];26(3):34-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1144

Issue

Section

Proceedings of the Acoustics Week in Canada