Influence of stud type and spacing, screw spacing, and sound absorbing material on the sound transmission through a double panel wall specimen

Quirt, J. D.; Warnock, A. C. C.; Halliwell, R. E.; Birta, J. A.

doi:10.1121/1.404482

Cited by 10 publications

(20 citation statements)

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“…11,12 Low-frequency dips in transmission loss versus frequency curves shifted to lower frequencies when the stud spacing or the spacing of the screws holding the gypsum board into wood studs was increased. The effect of varied stud spacing is qualitatively similar to that reported in this article.…”

Section: Discussionmentioning

confidence: 99%

On the sound insulation of wood stud exterior walls

Bradley

Birta

2001

The Journal of the Acoustical Society of America

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/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/10.1121/1.1416200# America, 110, 6, pp. 3086-3096, 2001-12-01 On the sound insulation of wood stud exterior walls Bradley, J. S.; Birta, J. A. This article reports the results of a series of measurements of the sound transmission loss of exterior wood stud walls. The measurements were made using standard laboratory procedures in which the walls were built between two reverberation chambers. The outdoor-indoor transmission class is used to rate the relative effectiveness of the various constructions. The measurement results are used to illustrate the influence of key parameters of the constructions on measured sound transmission loss values and to give guidance for future designs. The overall sound insulation of these wood stud walls, to typical outdoor noises, is shown to be limited by two types of low-frequency resonances. An understanding of these low-frequency limitations can most effectively lead to superior sound insulation in similar wood stud walls. Journal of the Acoustical Society of

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Section: Discussionmentioning

confidence: 99%

On the sound insulation of wood stud exterior walls

Bradley

Birta

2001

The Journal of the Acoustical Society of America

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“…These calculations would also explain why the assumption of normal incidence appears to work reasonably well. Quirt and Warnock (1993) have shown that the sound insulation of wooden stud walls is strongly dependent on the screw spacing while the sound insulation of steel stud walls only varies slightly with screw spacing. Thus it may be that the line connection theory is adequate for steel stud walls; if suitable a stud compliance as a function of frequency can be determined (Davy et al, 2012).…”

Section: Resilient Massless Point Connectionsmentioning

confidence: 98%

Sound transmission of cavity walls due to structure borne transmission via point and line connections

Davy¹

2012

The Journal of the Acoustical Society of America

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The author has published equations for predicting the air borne sound transmission of double leaf cavity walls due to the structure borne sound transmission across the air cavity via (possibly resilient) line connections, but has never published the full derivation of these equations. The author also derived equations for the case when the connections are rigid point connections but has never used them or published them or their derivations. This paper will present the full derivation of the author's theory of the air borne sound transmission of double leaf cavity walls due to the structure borne sound transmission across the air cavity via point or line connections which are modeled as four pole networks. The theoretical results will be compared with experimental results on wooden stud cavity walls from the National Research Council of Canada because the screw spacing is given for these results. This enables connections via studs and screws to be modeled as point connections and avoids the need to make any assumptions about the compliance of the equivalent point or line connections.

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“…8 and 9. In general, when a fibrous absorber is installed in the cavity, sound insulation increases with increasing internal sound reduction of the absorber, that is, with increasing density or thickness of the absorber [1][2][3][4]. However, from these results, it can be deduced that the sound insulation depends on the acoustic resistance but not on the sound absorption coefficient, because the absorption coefficient becomes unity at resonance frequency f 0 when the acoustic resistance is unity.…”

Section: Relationship Between Acoustic Impedance Ofmentioning

confidence: 99%

“…However, this is not the best strategy because it increases the wall's total weight and thickness. Installing fibrous absorbers in the cavity improves sound insulation only at mid-and high frequencies; these absorbers have less effect on sound insulation at low frequencies including f rmd [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of inserting a Helmholtz resonator on sound insulation in a double-leaf partition cavity

Sugie

Yoshimura

Iwase

2009

Acoust. Sci. & Tech.

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We investigated the improvement of sound insulation of a double-leaf partition using Helmholtz resonators. We proposed a method of predicting the sound reduction index R 0 at normal incidence using impedance transfer, under the assumption that the resonators installed in the air cavity between the two leaves were independent components of a wall, similarly to boards and studs. Furthermore, for experimentation, a small sample without studs was used to prevent flanking transmission through them. Theoretical and empirical examinations revealed that installing the resonators in the cavity in the following manner was sufficient to control sound insulation at low frequencies. High sound insulation occurred at the resonance frequency f 0 of resonators; the sound insulation decreased at higher and lower frequencies than f 0. The sound insulation at f 0 depended on the acoustic resistance of resonators. When an air layer existed behind the resonators, other peaks and dips appeared at higher frequencies than f 0. Installing both a fibrous absorber and resonators in the cavity was sufficient to recover the decreased performance of sound insulation owing to the installation of resonators.

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Influence of stud type and spacing, screw spacing, and sound absorbing material on the sound transmission through a double panel wall specimen

Cited by 10 publications

References 0 publications

On the sound insulation of wood stud exterior walls

On the sound insulation of wood stud exterior walls

Sound transmission of cavity walls due to structure borne transmission via point and line connections

Effect of inserting a Helmholtz resonator on sound insulation in a double-leaf partition cavity

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