Sound intensity and sound reduction index

✍ Scribed by Hans G. Jonasson

• Book ID: 102988199
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 552 KB
• Volume: 40
• Category: Article
• ISSN: 0003-682X
• DOI: 10.1016/0003-682x(93)90082-h

✦ Synopsis

The sound intensity technique has been tested on sound insulation measurements under laboratory conditions. A detailed measurement and evaluation procedure is proposed. About 30 different measurements have been carried out in three different laboratories to estimate the precision of this intensity method when compared with the traditional measurement technique. It is shown that agreement with traditional measurements of the sound reduction index is excellent. If the Waterhouse correction is applied in the receiving room the weighted sound reduction index Rw is overestimated by about 0.5 dB with a standard deviation of 1.0 dB. Without this correction there is a small underestimate. A small "round-Robin' investigation indicates that the sound intensity method is more reliable than the traditional method when measurements are carried out on windows with high sound insulation.