Measurement of the Sound Power Incident on the Walls of a Reverberation Room with Near Field Acoustic Holography

Authors: Jacobsen, Finn; Tiana-Roig, Elisabet

Source: Acta Acustica united with Acustica, Volume 96, Number 1, January/February 2010 , pp. 76-81(6)

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Abstract:

The conventional method of measuring the insertion loss of a partition relies on an assumption of the sound field in the source room being diffuse combined with the classical relation between the spatial average of the mean square pressure in the source room and the incident sound power per unit area; and it has always been regarded as impossible to measure the sound power that is incident on a wall directly. This paper examines a new method of determining this quantity from sound pressure measurements at positions on the wall using 'statistically optimised near field acoustic holography' (SONAH). The purpose is to examine whether one should use a correction similar to the well-known 'Waterhouse correction' when the incident sound power is deduced from the sound pressure in the source room.

Document Type: Research article

DOI: http://dx.doi.org/10.3813/AAA.918258

Publication date: 2010-01-01

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Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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Measurement of the Sound Power Incident on the Walls of a Reverberation Room with Near Field Acoustic Holography

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