Anisotropy effect in glass wool on normal impedance in oblique incidence

A new method has been used for measuring normal impedance for oblique incidence on a glass wool. The method allows measurements at low frequencies for large angles of incidence. A ratio close to two for the normal and the planar specific flow resistance gives a good agreement between theoretical pre...

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Veröffentlicht in:	Journal of sound and vibration 1987-04, Vol.114 (2), p.233-238
Hauptverfasser:	Allard, J.F., Bourdier, R., L'Esperance, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustical measurements and instrumentation Acoustics Exact sciences and technology Fundamental areas of phenomenology (including applications) Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	A new method has been used for measuring normal impedance for oblique incidence on a glass wool. The method allows measurements at low frequencies for large angles of incidence. A ratio close to two for the normal and the planar specific flow resistance gives a good agreement between theoretical predictions and measurements. This result confirms recent experiments carried out on glass wools.
ISSN:	0022-460X 1095-8568
DOI:	10.1016/S0022-460X(87)80150-5