✦ LIBER ✦

Officers for 1930

Publisher: Elsevier Science
Year: 1930
Tongue: English
Weight: 34 KB
Volume: 209
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(30)90880-0

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✦ Synopsis

The results of experiments with paper, sailcloth, felt, fibre board, mahogany and brick work are given. In general the transmission ratio grows less as the frequency of the test sound rises from 300 to 16oo cycles per sec. Cartridge paper transmitted .5 of the incident energy while only a few millionths of the energy emerged from a brick wall built into the aperture or from fibre boards with a wide air space between them. " On the whole, the single-brick wall is superior to the other constructions tested."

Since apartment houses have become so common with their problems of sound insulation, investigations such as the above should prove of value for purposes of design.

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