sound

Development of an acoustic method for the determination of the air leakage of building elements installed in a building. Entwicklung einer akustichen Messmethod zur ermittlung der Luftdurchlassigkeit von Bauelementen in eingebauten Zustand.

Submitted by on Sat, 07/06/2013 - 15:50

The conduction of sound through the gap between window and wall depends on the width of the gap. This width also determines the air leakage, suggesting that air leakage might be measured by an acoustic method. Notes method requires that cracks are relatively large and have fewer than three kinks. Reports measurements in a wind tunnel of air flow through crack models made from aluminium and compares results with theory. Finds empirical expression relating pressure difference to air flow and gives graphs of results.

Acoustical and thermal performance of exterior residential walls, doors and windows.

Submitted by on Sat, 07/06/2013 - 15:50

Reports laboratory tests of sound transmission loss, thermal transmittance and rate of air leakage conducted on full-scale specimens of typical residential exterior wall constructions, either unbroken or penetrated by a door or window. A total of 109 acoustical tests and 48 thermal tests are reported. The resultant data are compared with literature data on similar constructions. Some correlation was found between sound transmission loss and air leakage.

The use of sound to locate infiltration openings in buildings

Submitted by on Sat, 07/06/2013 - 15:50

Suggests the use of sound waves to locate openings in buildings that allow air infiltration. Reports results of an experimental program, including laboratory tests of a specially constructed partition and field tests on eight buildings. 

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