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Sound absorption by porous materials I

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Applied Scientific Research, Section B

Summary

It is a well-known fact that, in order to obtain maximum absorption, sound-absorbing materials must not be fastened directly to the structural wall or ceiling, but must be kept at a certain distance, small in practice, from the wall or the ceiling. After describing a new interferometer some results concerning the influence of the thickness of the layer of air between material and wall are given. These results are discussed and explained theoretically. Most remarkable is the large influence of very thin layers of air on the frequency at which a maximum absorption is obtained.

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Authors and Affiliations

  1. Geluidscommissie T.N.O. and Laboratorium voor Technische Physica der Technische Hogeschool, Delft

    J. v. d. Eijk, C. W. Kosten & W. Kok

Authors
  1. J. v. d. Eijk
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  2. C. W. Kosten
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  3. W. Kok
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v. d. Eijk, J., Kosten, C.W. & Kok, W. Sound absorption by porous materials I. Appl. Sci. Res. 1, 50–62 (1950). https://doi.org/10.1007/BF02919928

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  • DOI: https://doi.org/10.1007/BF02919928

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