Protective cover assembly having enhanced acoustical characteristics
First Claim
1. A sound-transmissive protective cover assembly comprising:
- (a) a protective membrane layer having first and second surfaces and a perimeter defined by its edges,(b) a porous support layer having first and second surfaces;
one said surface of each of said protective membrane layer and porous support layer selectively bonded together to form a bonded outer region within said perimeter and, surrounded by said bonded outer region, an unbonded inner region wherein said protective membrane and said porous support material are free to move independently in response to acoustic energy passing therethrough, and thereby minimally attenuating said acoustic energy.
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Accused Products
Abstract
A sound-transmissive cover assembly 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 has a protective membrane layer and a porous support material layer 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 and porous support layer can vibrate or move independently in response to acoustic energy passing through them. An embodiment of the assembly includes at least one acoustic gasket attached to one or both of the layers so as to not impede independent movement of the layers.
148 Citations
17 Claims
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1. A sound-transmissive protective cover assembly comprising:
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(a) a protective membrane layer having first and second surfaces and a perimeter defined by its edges, (b) a porous support layer having first and second surfaces; one said surface of each of said protective membrane layer and porous support layer selectively bonded together to form a bonded outer region within said perimeter and, surrounded by said bonded outer region, an unbonded inner region wherein said protective membrane and said porous support material are free to move independently in response to acoustic energy passing therethrough, and thereby minimally attenuating said acoustic energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A sound-transmissive protective cover assembly comprising:
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(a) a protective membrane layer having first and second surfaces and a perimeter defined by its edges, (b) a porous support layer having first and second surfaces, and (c) at least one acoustic gasket; one said surface of each of said protective membrane layer and porous support layer selectively bonded together to form a bonded outer region within said perimeter and, surrounded by said bonded outer region, an unbonded inner region wherein said protective membrane and said porous support material are free to move independently in response to acoustic energy passing therethrough; said at least one gasket attached to at least one said layer so as to not impede independent movement of said protective membrane layer and said porous support layer in said unbonded region; whereby a protective cover assembly which substantially prevents passage of acoustic energy through said gasket and which minimally attenuates acoustic energy passing through said unbonded region is provided.
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Specification