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Journal Articles Applied Acoustics Year : 2018

Experimental characterization of air-borne sound sources via surface coupling

Abstract

The paper examines whether an advanced experimental method, the surface coupling method, could be used to intrinsically characterize a sound source. Such a characterization can be used in turn to predict sound radiation of the source into an arbitrary space. The surface coupling method considers the source as being made up of the physical source together with a part of the surrounding medium contained within an enveloping surface. The source is entirely characterized by two intrinsic descriptors measured across the interface surface – its blocked pressure and its surface impedance. In order to allow the use of a simple-shaped interface the identification of descriptors is done by the Patch Impedance approach. To demonstrate the principle of the surface coupling method a 1D experimental validation – prediction of sound radiated by a driver in a tube – is carried out first. The validation of the general 3D technique is then done by characterizing a 2-driver loudspeaker radiating into an irregular cavity. Both experiments confirm the feasibility of the sound prediction by experimental source characterization via surface coupling.
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Dates and versions

hal-02111753 , version 1 (26-04-2019)

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Liangfen Du, Goran Pavić. Experimental characterization of air-borne sound sources via surface coupling. Applied Acoustics, 2018, 134, pp.97-109. ⟨10.1016/j.apacoust.2018.01.007⟩. ⟨hal-02111753⟩
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