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Subjective study of the sound-transmission class system for rating building partitions

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FormatText, Article
SubjectWalls
Abstract
The use of single number ratings in describing the acoustic performance of various building elements is very common. Examples of this are the sound transmission class (STC) of a wall or the impact noise rating of a floor. In the STC rating method, a transmission loss (TL) curve of irregular shape is compared to a standard reference curve. The contribution of various frequency bands depends on the shape of the standard curve and the method of comparison. An experiment has been carried out to determine the relative subjective importance of the various frequency bands and how the change in subjective rating due to irregularities in a TL curve compares with the rating obtained by using the standard curve and fitting rules. Results indicate that the present STC rating system is overconservative in rating changes in a TL curve and that narrow coincidence type dips are not very important.
Date published
In
  • Journal of the Acoustical Society of America 47, no. 3 (Part 1) (1 July 1970): 676–682.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-RP-445
NRC numberNRCC 11463
NRC-IRC-6988
NPARC number20338545
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Record identifier5376fbe4-a248-4201-8bd1-3c6ca2f7e8d4
Record created2012-07-19
Record modified2024-01-26

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