A different look at the anechoic wedge
作者:
Glenn E. Warnaka,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1984)
卷期:
Volume 75,
issue 3
页码: 855-858
ISSN:0001-4966
年代: 1984
DOI:10.1121/1.390595
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Anechoic wedges are conventionally installed with the tapered point of the wedge pointing toward the test space and with the flat base of the wedge either against a rigid wall or separated from the wall by an air gap. A comparative investigation has been carried out in which the wedges were first conventionally oriented and then turned 180° so that the points of the wedges faced the wall. These comparative tests were performed in reverberation rooms both here and in Europe and also in two different impedance tubes. The results are extremely interesting. They tend to indicate that a ‘‘reversed’’ anechoic wedge can give a lower cutoff frequency than when conventionally oriented. Some possible explanations are offered for the measured performance.
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