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Standard deviation in the power measurement of sound sources by the free field method

โœ Scribed by M. Tohyama; A. Imai; H. Tachibana

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
360 KB
Volume
114
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

Standard deviation in sound power measurements made by the free field method (ISO 3745) is discussed. The authors numerically investigated the relationship between the standard deviation and the directivity characteristics of sound sources. The standard deviation of the sound power of sources as measured according to ISO 3745 increases as the directivity of the sources becomes sharp. However, the standard deviations are almost constant when the directivity characteristics approximate a cos 2" 6 function with n < 3.

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