Sound intensity measurements are quite useful as an acoustic measurement technique since in a reverberant environment, even with background noise, the free field as well as the diffuse sound field can be determined. A commonly used intensity probe consists of two closely spaced identical microphones. Especially the phase characteristics of the two microphones should be the same. A much simpler intensity probe is presented, consisting of a microphone and a particle-velocity sensor: the Microflown. Critical experiments show that the performance of this intensity probe is as good as that of the intensity probe using two identical microphones. There are a number of advantages to the new probe: no accurate matching of the sensors is necessary; the same configuration can be used for different frequency ranges, and the dimensions of the probe can be smaller.

Authors: Druyvesteyn, W. F.; de Bree, H. E.
Affiliations: University ofTwente,Enschede,and PhilipsResearchLaboratories, Eindhoven,The Netherlands ; MESA ResearchInstitute of Twente,Enschede,The Netherlands (See document for exact affiliation information.)
JAES Volume 48 Issue 1/2 pp. 49-56; February 2000
Publication Date: February 1, 2000 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=12076

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