To provide a sound-transmissive cover assembly which provides protection from the ambient environment to transducer devices, such as microphones, loudspeakers, buzzers and ringers.
A cover assembly includes a microporous protective membrane that is captivated at the outer region near the edges between two adhesive support systems. Since an inner unbonded region surrounded by the bonded outer region is formed, the protective membrane is displaced or move in response to acoustic pressure waves. The protective membrane design in conjunction with the configuration allows sound energy to pass through the protective membrane with very low attenuation, while being able to withstand long-term exposure to liquid intrusion. A constitution of the cover assembly includes an attached acoustic gasket so as to show sealing function and focus acoustic energy to housing openings.
| WO/2010/017849 | MOBILE ELECTRONIC DEVICE |
| JPS6374297 | SPEAKER SYSTEM |
| WO/2009/098888 | VIBRATION PICKUP MICROPHONE |
CHAPMAN BRIAN G
| JP2002502561A | 2002-01-22 | |||
| JPH05320255A | 1993-12-03 | |||
| JPH0879865A | 1996-03-22 |
| US5828012A | 1998-10-27 |
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu
Satoshi Deno
Atsushi Ebiya