Laboratory Simulation Of Diffuse Pressure Fields
Author(s)
T. Bravo & S.J. Elliott
Abstract
This paper discusses the determination of the sound reduction index of a flexible
partition mounted between two rooms at low frequencies, where the diffuse
approximation of the sound field is no longer valid. In this frequency range, the
modal density of the rooms is not sufficiently high and the statistical approach
does not properly describe the behaviour of the system. It is, then, of particular
interest to investigate the feasibility of reproducing experimentally a diffuse
acoustic pressure field using an array of loudspeakers in the sound transmission
suite. This approach would allow the transmission loss measurements to be
performed without limitations at low frequencies. An analytical model based on
modal equations has been used to show the influence of the measuring facilities
in the determination of the transmission loss factor. A s
Keywords
Related Book
Other papers in this volume
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