✦ LIBER ✦

A small-scale multi-purpose reverberation room

✍ Scribed by D.S. Pallett; E.T. Pierce; D.D. Toth

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 834 KB
Volume: 9
Category: Article
ISSN: 0003-682X
DOI: 10.1016/0003-682x(76)90010-4

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✦ Synopsis

A one-fourth scale model of the large (425m 3) National Bureau oJ" Standards reverberation room is described. This facility was constructed to carry out acoustical research at relatively low cost in a frequency range two octaves higher than that used in the larger facility. Initial experimental measurements carried out in this facility concern sound power emitted by small sources. The pure tone qualification procedure specified in American National Standard S1.21 -1972 "MethodsJ'or the Determination of Sound Power Levels of Small Sources in Reverberation Rooms" was carried out using computer control of the experiment. This standard is oJparticular interest to the international acoustical community since it is technically equivalent to 1SO Documents DIS 3741 and DIS 3742. The effect of increased low frequency.absorption upon room qualification was tested in the model room. Future research plans to make use of the small-scale reverberation rooms are described.

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