Rating Airborne Sound Insulation in Terms of the Annoyance and Loudness of Transmitted Speech and Music Sounds

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DOIResolve DOI: http://doi.org/10.4224/20377190
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TypeTechnical Report
Series titleResearch Report, NRC Institute for Research in Construction; Volume 242
SubjectSpeech security
AbstractThis report describes the results of evaluations of airborne sound insulation measures in terms of the annoyance and loudness of transmitted speech and music sounds. Subjects rated sounds simulating transmission through 20 different walls with a wide range of sound transmission characteristics. The evaluated measures included the standard Sound Transmission Class (STC) and the Weighted Sound Reduction Index (Rw) as well as variations of these measures. In addition, many other signal-to-noise type measures and loudness-related measures were included in the evaluations. The results showed that the frequencies important for rating speech sounds were quite different to those required for music sounds. As a consequence, measures that predicted ratings of transmitted music sounds well tended to be less successful for speech sounds and vice versa. Some compromise measures were found and new spectrum adaptation terms added to Rw values were seen to be a successful and practical means of more accurately rating airborne sound insulation.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number18834
NPARC number20377190
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Record identifier94f5e424-e5f7-4915-8c7a-499d0530560a
Record created2012-07-24
Record modified2016-10-03
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