Abstract
Until recently the standards of sound insulation in buildings were those that resulted from traditional building methods, and often depended on other consideration than protection against noise; i.e., fire resistance, stability, etc. Such “standards” are becoming increasingly unsatisfactory at the present time owing to change of methods and materials of building, also the arrival of new sources of noise, such as radios, aircraft, and automobiles. An opinion survey has recently been carried out in Britain to assess the reaction of occupants in apartments separated by floors having either 40-, 45-, or 50-db sound insulation from each other. The reactions of the occupants to intruding noise in terms of verbal responses such as “disturbance,” “annoyance,” etc., have been related to the physical measurements of sound insulation.
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