Protective cover assembly having sound transmission...

G - Physics – 10 – K

Patent

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Details

G10K 11/24 (2006.01) G10K 11/18 (2006.01) H04R 1/02 (2006.01)

Patent

CA 2254340

A sound-transmissive cover assembly (14) which provides protection from the ambient environment to transducers such as microphones, loudspeakers, buzzers, ringers, and other delicate devices; and across which sound energy can pass with very low attenuation. The cover assembly (14) has a protective membrane layer (22) and a porous support material layer (30) which are selectively bonded together at least in the outer region near their edges. An inner unbonded region surrounded by the bonded outer region is provided so that the protective membrane (22) and porous support layer (30) can vibrate or move independently in response to acoustic energy passing through them. An embodiment of the assembly includes at least one acoustic gasket (40) attached to one or both of the layers so as not to impede independent movement of the layers.

Cette invention concerne un boîtier de protection de transmission acoustique (14) servant à protéger contre l'environnement ambiant des transducteurs tels que des microphones, haut-parleurs, ronfleurs, récepteurs d'appels et autres dispositifs délicats, et pouvant laisser passer l'énergie acoustique avec une très faible atténuation. Le boîtier (14) comprend une couche de membrane de protection (22) et une couche d'une matière de support poreuse (30) partiellement liées l'une à l'autre, au moins par leur région périphérique, à proximité des bords. Une partie non liée, entourée par la région périphérique liée, est ménagée de sorte que la membrane de protection (22) et la couche de support poreuse (30) puissent vibrer ou réagir sans entrave à l'énergie acoustique qui les traverse. Une forme d'exécution du boîtier comprend au minimum un joint acoustique (40) fixé sur une couche ou les deux à la fois, de façon à permettre un mouvement indépendant des couches.

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