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      Basic considerations on the practical method for predicting sound insulation performance of a single-leaf window

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          Abstract

          As a basic study of a practical method for predicting sound insulation performance of windows, this report presents a study of the sound reduction index of windows with single glazing below a critical frequency. First, results calculated by an existing theory for a single plate for the sound reduction indices are compared with measured results of actual windows to assess the theory’s applicability for evaluating the sound insulation performance of windows. Next, a regression analysis is employed to measured results of a certain number of actual windows to explore a further development of a more practical prediction. The following findings were obtained: (1) Sound reduction indices of actual fixed windows are predictable using Sewell’s transmission theory for a single plate. However, sound reduction indices of openable windows, especially those of sliding windows, are affected strongly by window frame gaps. Therefore, predicting sound reduction indices of all windows accurately is difficult if using only one theory. (2) The frequency slope of the window reduction index is much lower than that of the mass law. Regression analyses indicate that the frequency slope of the reduction index of all examined windows is 3.0 dB per octave, on average.

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          Author and article information

          Journal
          UCL Open: Environment Preprint
          UCL Press
          18 March 2021
          Affiliations
          [1 ] YKK AP Inc., YKK AP R&D Centre, 1 Ogyu, Kurobe, Toyama, Japan
          [2 ] Environmental Acoust. Lab., Graduate School of Engineering, Kobe University 1-1 Rokkodai, Nada, Kobe, Hyogo, Japan
          Article
          10.14324/111.444/000071.v1

          This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY) 4.0 https://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

          Funding
          None. None.

          The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

          Architecture

          architectural acoustics, mass law, measurement, single glazing, sound insulation, window, Built environment

          Comments

          Date: 6 April 2021

          Handling Editor: Dr Francesco Aletta

          Editorial decision: Request revision. The Handling Editor requested revisions; the article has been returned to the authors to make this revision.

          2021-04-21 09:09 UTC
          +1

          Date: 18 March 2021

          Handling Editor: Dr Francesco Aletta

          Status: This article is a preprint article and has not been peer-reviewed. It is under consideration following submission to UCL Open: Environment for open peer review.

          2021-03-18 16:22 UTC
          +1

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