发明名称 |
SOUND-TRANSMITTING FILM FOR MICROPHONE, SOUND-TRANSMITTING FILM MEMBER FOR MICROPHONE PROVIDED WITH THE FILM, MICROPHONE, AND ELECTRONIC DEVICE PROVIDED WITH MICROPHONE |
摘要 |
<p>The present invention provides a sound-transmitting membrane for a microphone, to be disposed to a sound-collecting opening of the microphone so as to allow sound to transmit through the membrane while preventing a foreign matter from entering into the microphone through the opening. This membrane for a microphone prevents the entry of a foreign matter, such as fine dust and water vapor, that is difficult for conventional sound-transmitting membranes to block, and ensures the microphone performance. This membrane for a microphone is composed of a nonporous film or a multilayer membrane including a nonporous film, has a surface density of 30 g/m 2 or less, and has a sound transmission loss of less than 3 dB in a frequency range of 300 to 4000 Hz.</p> |
申请公布号 |
EP2475186(A1) |
申请公布日期 |
2012.07.11 |
申请号 |
EP20100813523 |
申请日期 |
2010.09.03 |
申请人 |
NITTO DENKO CORPORATION |
发明人 |
ABE, YUUICHI;FURUUCHI, KOUJI;TAKIISHI, KOUSEI |
分类号 |
H04R1/08;H04M1/03 |
主分类号 |
H04R1/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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