Patent ID: 9253297
Filing Date: 2016-02-02
CPC Classification: H04M,H04R

Claim Text:
1. A sound-transmitting membrane member for a microphone, comprising: a sound-transmitting membrane to be disposed to a sound-collecting opening of the microphone and/or a sound-collecting opening of a casing of an electronic device having the microphone so as to allow sound to transmit through the sound-transmitting membrane while preventing a foreign matter from entering into a sound transducer of the microphone through the sound-collecting opening, the sound-transmitting membrane having two main surfaces positioned opposite to each other; and a double-sided adhesive sheet for bonding the sound-transmitting membrane to a member having the sound-collecting opening so as to cover the sound-collecting opening, wherein the double-sided adhesive sheet is placed on a peripheral portion of at least one main surface of the sound-transmitting membrane, wherein the sound-transmitting membrane is composed of a nonporous film or a multilayer membrane including a nonporous film, has a surface density of 30 g/m has a sound transmission loss of less than 3 dB in a frequency range of 300 to 4000 Hz, and wherein both of the main surfaces of the sound-transmitting membrane are exposed to an outside of the sound-transmitting membrane member except for the peripheral portion on which the double-sided adhesive sheet is placed.