Sound intensity probe calibrator for field use: calculating the sound field in the calibrator using boundary element modelling

Bernard Ginn, Erling S. Olsen, Vicente Cutanda Henríquez, Johan Gramtorp, Anders Eriksen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The newest generation of sound intensity measurement equipment is small and light enough to be hand-held when used for measurements in the field. This increases the need for field verification of the equipment. Field verification must be easy to perform and should not require the equipment to be taken apart. Therefore it was decided at Brüel & Kjær to develop an intensity probe calibrator that could be used for the two-microphone intensity probe as it is, without dismounting the spacer. The geometry of the cavity of the calibrator with probe is rather complex, and it turned out that a simple model based on geometric considerations could not be made for predicting the acoustic properties of the calibrator. Therefore a Boundary Element Model of the calibrator cavity was developed and successfully used in the design of the calibrator. The calculations are shortly described, and the sound fields in the coupler with different cavity geometries and source configurations and the corresponding microphone responses are discussed.

Original languageEnglish
Title of host publicationProceedings of Forum Acusticum 2002 : http://www.cica.es/~forum2002/
Number of pages6
PublisherInstitute of Acoustics
Publication date2002
Publication statusPublished - 2002
Externally publishedYes

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