ABSORBENT MATERIAL COMPRISING CAVITIES HAVING A RESISTIVE SKIN AND PROCESS FOR MANUFACTURING SUCH A MATERIAL

The invention relates to a sheet material (10) for acoustic absorption, comprising a panel (12) which is produced from a porous material (14) and of which one absorption face (18) delimits at least one acoustic absorption cavity (16), characterized in that the cavity (16) is delimited by a resistive...

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Bibliographische Detailangaben
Hauptverfasser:	CHAIGNE, SEBASTIEN, PETEUL, CLAIRE, CASTEL, FRANCK
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR CUTTING CUTTING-OUT DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING HAND CUTTING TOOLS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORATING PERFORMING OPERATIONS PHYSICS PUNCHING SEVERING SEVERING BY MEANS OTHER THAN CUTTING SOUND-PRODUCING DEVICES STAMPING-OUT TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a sheet material (10) for acoustic absorption, comprising a panel (12) which is produced from a porous material (14) and of which one absorption face (18) delimits at least one acoustic absorption cavity (16), characterized in that the cavity (16) is delimited by a resistive skin (20) which is produced integrally with the panel (12), in order to increase the acoustic absorption properties of the material (10) by acting on the contrast in dynamic permeability between the cavity (16) and the air located in the cavity (16). L'invention concerne un matériau en plaque (10) pour l'absorption acoustique, comportant un panneau (12) qui est réalisé en matière (14) poreuse et dont une face d'absorption (18) délimite au moins une cavité (16) d'absorption acoustique, caractérisé en ce que la cavité (16) est délimitée par une peau (20) résistive qui est réalisée venue de matière avec le panneau (12), afin d'augmenter les propriétés d'absorption acoustique du matériau (10) en agissant sur le contraste de perméabilité dynamique entre la cavité (16) et l'air situé dans la cavité (16).