Evaluating signal-to-noise ratios, loudness, and related measures as indicators of airborne sound insulation

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1121/1.3192347Journal of the Acoustical Society of America, 126, 3, pp. 1219America, 126, 3, pp. -1230America, 126, 3, pp. , 2009 Evaluating signal-to-noise ratios, loudness, and related measures as indicators of airborne sound insulation Park, H. K.; Bradley, J. S. The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42Evaluating signal-to-noise ratios, loudness, and related measures as indicators of airborne sound insulation Subjective ratings of the audibility, annoyance, and loudness of music and speech sounds transmitted through 20 different simulated walls were used to identify better single number ratings of airborne sound insulation. The first part of this research considered standard measures such as the sound transmission class the weighted sound reduction index ͑R w ͒ and variations of these measures ͓H. K. Park and J. S. Bradley, J. Acoust. Soc. Am. 126, 208-219 ͑2009͔͒. This paper considers a number of other measures including signal-to-noise ratios related to the intelligibility of speech and measures related to the loudness of sounds. An exploration of the importance of the included frequencies showed that the optimum ranges of included frequencies were different for speech and music sounds. Measures related to speech intelligibility were useful indicators of responses to speech sounds but were not as successful for music sounds. A-weighted level differences, signal-to-noise ratios and an A-weighted sound transmission loss measure were good predictors of responses when the included frequencies were optimized for each type of sound. The additio...

Justification of standardized level differences in rating of airborne sound insulation between dwellings

“…Thereafter, the sound pressure levels L 2 in the receiving room could be calculated on the basis of level differences D. There are several noise ratings used in description of noise spectrum in a room [e.g. [25][26][27][28]. Our purpose was to find out how the SNQs for airborne sound insulation are associated with the levels of transmitted living sounds.…”

Assessment of adequacy of single number quantities for wall insulation performance based on the Zwicker’s loudness of transmitted indoor noise

“…Over the past years, several authors argued on whether it is more appropriate to use loudness or annoyance to rank sound insulation performance. 23 Different authors came to different conclusions, for example, Park and Bradley 24 and Hongisto et al 10 showed that the correlations for loudness and annoyance in sound insulation context in dwellings are rather high. In a later study, Hongisto et al 25 show a much higher correlation between the existing SNQs and loudness than those obtained for annoyance (in the case of airborne façade insulation).…”