Measurement of plane wave acoustic fields in flow ducts

Standing wave acoustic parameters describing the acoustic field within flow ducts can be conveniently derived by considering a sufficiently long section of duct as an impedance tube. This paper describes a measurement approach in which information is acquired by analysis of wall pressure records obt...

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Bibliographic Details
Published in:Journal of sound and vibration 1980-01, Vol.72 (4), p.539-542
Main Authors: Davies, P.O.A.L., Bhattacharya, M., Bento Coelho, J.L.
Format: Article
Language:English
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Summary:Standing wave acoustic parameters describing the acoustic field within flow ducts can be conveniently derived by considering a sufficiently long section of duct as an impedance tube. This paper describes a measurement approach in which information is acquired by analysis of wall pressure records obtained simultaneously from a pair or an array of fixed points. This procedure minimizes most of the disadvantages associated with conventional methods, but requires facilities for fast digital data acquisition and processing.
ISSN:0022-460X
1095-8568
DOI:10.1016/0022-460X(80)90363-6