COMPOSITE SOUND ABSORPTION MATERIAL AND SOUND ABSORPTIVE INTERIOR MATERIAL

PROBLEM TO BE SOLVED: To provide a composite sound absorption material and sound absorptive interior material that can easily adjust the air permeability and can improve the sound absorption performance by adjusting the air permeability.SOLUTION: A composite sound absorption material 1 includes a sy...

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Hauptverfasser:	KOSAKAI AKIRA, ISHIMARU TAKU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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