Abstract
A prediction model describing the absorption coefficient of a plate and membrane system is derived. Measurements of absorption coefficients in an impedance tube and in a reverberation chamber are carried out for various constructions. Predicted and measured results are compared. The prediction model is found to give satisfactory results. It is found that the absorption is mainly determined by viscous losses induced in the space between plate and membrane. The performance of the absorbent is very sensitive to changes of distance between plate and membrane.
Original language | English |
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Journal | Acustica United with Acta Acustica |
Volume | 57 |
Issue number | 3 |
ISSN | 1610-1928 |
Publication status | Published - 1985 |
Externally published | Yes |
Bibliographical note
pp. 139-148(10)ISSN 1610-1928 (Print)