Low-Frequency Airborne Sound Transmission through Single Partitions in Buildings

Osipov, Alexander; Mees, Paul; Vermeir, Gerrit

doi:10.1260/0957456991496141

Cited by 31 publications

(47 citation statements)

References 5 publications

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“…Concerning reproducibility, significant differences can be observed in the sound reduction index when measured in different laboratories, especially at low frequencies [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Repeatability and Reproducibility of Laboratory Sound Insulation Measurements

Dijckmans

Vermeir²

2013

Acta Acustica united with Acustica

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An extensive parametric study has been carried out with a wave based model to numerically investigate the fundamental repeatability and reproducibility of labo- elements, the reproducibility of the intensity method is better. For heavy walls and lightweight double constructions, however, the predicted uncertainty is similar for the three measurement methods. The results of the reproducibility study are also used to investigate systematic differences between the pressure method and both intensity methods.

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“…Concerning reproducibility, significant differences can be observed in the sound reduction index when measured in different laboratories, especially at low frequencies [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Repeatability and Reproducibility of Laboratory Sound Insulation Measurements

Dijckmans

Vermeir²

2013

Acta Acustica united with Acustica

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“…The low frequency sound insulation is not only affected by the properties of test wall but also by geometry and dimensions of room-wall-room system (Osipov et al, 1997). The diffuse field assumption is only valid in medium and high frequency ranges, as the sound field at low frequencies is dominated by few normal modes in reverberation chamber (Schroeder, 1996).…”

Section: Low Frequency Diffusion Issuementioning

confidence: 99%

Technical Notes: Practical Concerns Associated with Single-Number Ratings in Measuring Sound Transmission Loss Properties of Partition Panels

Garg¹,

Kumar²,

Maji³

2013

Archives of Acoustics

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The paper presents an extensive review investigating the practical aspects related to the use of singlenumber ratings used in describing the sound insulation performance of partition wall panels and practical complications encountered in precise measurements in extensive frequency range from 50 Hz to 5 kHz. SWOT analysis of various single number ratings is described. A laboratory investigation on a double wall partition panel combination revealed the significant dependence of STC rating on transmission loss at 125 Hz attributed to 8 dB rule. An investigation conducted on devising alternative spectrums of aircraft noise, traffic noise, vehicular horn noise and elevated metro train noise as an extension to ISO 717-1 Ctr for ascertaining the sound insulation properties of materials exclusively towards these noise sources revealed that the single-number rating Rw + Ctr calculated using ISO 717-1 Ctr gives the minimum sound insulation, when compared with Rw + Cx calculated using the alternative spectrums of aircraft noise, traffic noise, etc., which means that material provides a higher sound insulation to the other noise sources. It is also observed that spectrum adaptation term Cx calculated using the spectrum of noise sources having high sound pressure levels in lower frequencies decreases as compared to ISO 717-1 Ctr owing to significant dependence of Ctr at lower frequencies.

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“…The original model for single walls, developed by Osipov et al, 30 has been extended to multilayered structures. 31 The geometry of the considered problem is shown in Fig.…”

Section: Problem Definitionmentioning

confidence: 99%

Sound transmission through finite lightweight multilayered structures with thin air layers

Dijckmans

Vermeir

Lauriks

2010

The Journal of the Acoustical Society of America

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The sound transmission loss (STL) of finite lightweight multilayered structures with thin air layers is studied in this paper. Two types of models are used to describe the vibro-acoustic behavior of these structures. Standard transfer matrix method assumes infinite layers and represents the plane wave propagation in the layers. A wave based model describes the direct sound transmission through a rectangular structure placed between two reverberant rooms. Full vibro-acoustic coupling between rooms, plates, and air cavities is taken into account. Comparison with double glazing measurements shows that this effect of vibro-acoustic coupling is important in lightweight double walls. For infinite structures, structural damping has no significant influence on STL below the coincidence frequency. In this frequency region, the non-resonant transmission or so-called mass-law behavior dominates sound transmission. Modal simulations suggest a large influence of structural damping on STL. This is confirmed by experiments with double fiberboard partitions and sandwich structures. The results show that for thin air layers, the damping induced by friction and viscous effects at the air gap surfaces can largely influence and improve the sound transmission characteristics.

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Low-Frequency Airborne Sound Transmission through Single Partitions in Buildings

Cited by 31 publications

References 5 publications

Numerical Investigation of the Repeatability and Reproducibility of Laboratory Sound Insulation Measurements

Numerical Investigation of the Repeatability and Reproducibility of Laboratory Sound Insulation Measurements

Technical Notes: Practical Concerns Associated with Single-Number Ratings in Measuring Sound Transmission Loss Properties of Partition Panels

Sound transmission through finite lightweight multilayered structures with thin air layers

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