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Morset Sound Development
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Subject Single number ratings
Date
Fri Jan 16 2004 12:37
Author Tor Erik Vigran
(vigran@tele.ntnu.no)
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We have been a little reluctant to include single value numbers for sound insulation, mainly because calculations are based on infinite size specimen. Size and furthermore, mechanical connections between layers may be important in practical constructions. Neglecting these factors may give unrealistic values for the sound reduction index, certainly in the higher frequency range, and may lead to misinterpretations of the calculated values of Rw. However, since the Rw – values normally are determined by the results in the lower frequency range it may be reasonable to include such a feature. Thank you for the suggestion. We certainly will reconsider our position.
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