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Design charts for sound absorber layers

: Mechel, F.P.

Journal of the Acoustical Society of America : JASA 83 (1988), Nr.3, S.1002-1013
ISSN: 0001-4966
ISSN: 1520-8524
Fraunhofer IBP ()
bulk reacting; contour diagrams over impedance plane; diffuse sound incidence; locally reacting; oblique sound incidence; optimization; sound absorbers

Contour diagrams of the sound absorption coefficient of layers of mineral fibres are shown over the impedance plane and over the plane of dimensional parameters, such as thickness, flow resistivity, frequency and angle of incidence. Sound incidence is either oblique or diffuse. Those diagrams clearly show the influence of design parameters and give rules for optimizations.