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RESEARCH PAPERS: Noise Control and Acoustics

The Two-Microphone Sound Intensity Probe

[+] Author and Article Information
J. Pope

Bruel & Kjaer Instruments, Inc., 185 Forest Street, Marlborough, MA 01752

J. Vib., Acoust., Stress, and Reliab 110(1), 97-103 (Jan 01, 1988) (7 pages) doi:10.1115/1.3269487 History: Received September 18, 1987; Online November 23, 2009

Abstract

A probe consisting of a pair of pressure-sensing microphones is an integral part of most commonly used sound intensity measurement systems. Sound intensity is a vector that describes the average rate and direction of energy flow in an acoustic field. Recently the measurement of sound intensity has been of increasing theoretical and practical interest. The theory and technology of two-microphone probes are reviewed, with particular attention to the factors that impact the accuracy of intensity measurements. Proper measurement techniques and validation of results are discussed.

Copyright © 1988 by ASME
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