Angular response of a sound intensity probe at high frequencies

Authors

  • S.E. Keith Health Canada, Consum./Clin. Radiat. Protect. Bur., 775 Brookfield Rd. 6301B, Ottawa, Ont. K1A 1C1
  • V. Chiu Health Canada, Consum./Clin. Radiat. Protect. Bur., 775 Brookfield Rd. 6301B, Ottawa, Ont. K1A 1C1

Keywords:

Acoustic noise, Acoustic variables measurement, Amplifiers (electronic), Approximation theory, Cables, Fast Fourier transforms, Frequencies, Microphones, Robots, Omnidirectional sources, Pink noise, Planar measurement surfaces, Pressure-residual intensity

Abstract

The measurement of the polar response of a 1/2 inch p-p intensity probe and 12 mm spacer in 1/3-octave band frequencies was studied. It was observed that the probe was mounted 2.44 m above the tweeter sound source in a frame made of 6 mm diameter steel rod. It was shown that a 1/2 inch p-p intensity probe can approximate the ideal intensity response up to 10 kHz. It was suggested that sound power measurements at 5 kHz using large planar measurement surfaces could give lower results than obtained with the same measurement over a hemispherical measurement surface.

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Published

2004-09-01

How to Cite

1.
Keith S, Chiu V. Angular response of a sound intensity probe at high frequencies. Canadian Acoustics [Internet]. 2004 Sep. 1 [cited 2021 Oct. 20];32(3):94-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1644

Issue

Section

Proceedings of the Acoustics Week in Canada