Year: 1975
Type: conference-abstract
Abstract: The formulation for sound transmission through a panel generally credited to Cremer gives poor agreement with experimental results when calculated random incidence transmission is compared to reverberant field measured transmission, The usual solution to this problem is a truncation of the calculation somewhere short of grazing incidence, and definition of the result so calculated as the “field incidence” transmission. In the present study, sound transmission through a presumably predictable material (0.5 psf leaded vinyl sheet) has been measured using free-field excitation at several discrete incidence angles and a small reverberation room as a receiving room. Initial results indicate that behavior between 70° and grazing incidence is smooth, but in poor agreement with Cremer's formulation, with transmitted sound power nearly independent of incidence angle in this range. A proposed practical redefinition of sound transmission loss and finite panel corrections to the Cremer formulation is discussed.
DOI: 10.1121/1.1995220
Author: Bruce Walker
Language: English
Subfield: Acoustics and Ultrasonics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2039795534