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ON SOUND POWER DETERMINATION IN FLOW DUCTS

โœ Scribed by W NEISE; F ARNOLD

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
508 KB
Volume
244
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

The following problems associated with sound power determination in circular ducts carrying mean #ow are discussed: axial standing waves due to sound re#ections from the duct end; acoustic loading of the source; turbulent #ow pressures superimposed on the sound "eld; discrimination between sound pressures and turbulent #ow pressures; radial measurement position in the duct in view of higher order mode sound propagation and directional characteristic of the microphone probe used; modal distribution of sound power.

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