✦ LIBER ✦
Experimental study on sound insulation of membranes with small weights for application to membrane structures
✍ Scribed by N. Hashimoto; M. Katsura; Y. Nishikawa; K. Katagihara; T. Torii; M. Nakata
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 751 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0003-682X
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✦ Synopsis
In an earlier paper, it was shown that attaching small weights to a membrane (called MAW) improves the sound insulation in the low-frequency range. By applying this particular membrane to membrane structures, the sound insulation is improved without decreasing the light-transmission eficiency of the membrane. Experiments on the sound insulation were carried out to confirm this capability, and the results are as follows. (1) Sound-insulation mechanism of MA W has been identiJied in a diffuse sound$eld. (2) A double-layer membrane consisting of MAW and an ordinary membrane indicates 5-11 dB greater transmission loss in the low-frequency range than the double-layer membrane which is composed of two ordinary membranes.
The efect of MA W disappears when the thickness qf an air layer is less than 100 mm. A thickness of over 500 mm has to he kept maintained in order to get the special eflect.