SOUND-ABSORBING MATERIAL AND METHOD OF MAKING SUCH A SOUND-ABSORBING MATERIAL

Sound-absorbing material includes a monolithic main layer which is made of non-woven fiber fabric and has two opposite faces delimiting the thickness of the monolithic main layer. The monolithic main layer has a density gradient in the direction of its thickness. The monolithic main layer has a grad...

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Bibliographische Detailangaben
Hauptverfasser:	BASTAROLO, Marina, ALFONSI, Arianna, BELTRAME, Francesca
Format:	Patent
Sprache:	eng
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
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Beschreibung
Zusammenfassung:	Sound-absorbing material includes a monolithic main layer which is made of non-woven fiber fabric and has two opposite faces delimiting the thickness of the monolithic main layer. The monolithic main layer has a density gradient in the direction of its thickness. The monolithic main layer has a gradient in the fiber count in the direction of its thickness which decreases, passing from a first face to a second face of the monolithic main layer. The density gradient has an inverse trend with respect to the gradient in fiber count.