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Sound-transmitting membrane for microphone, sound-transmitting membrane member for microphone provided with the membrane, microphone, and electronic device provided with microphone
Sound-transmitting membrane for microphone, sound-transmitting membrane member for microphone provided with the membrane, microphone, and electronic device provided with microphone
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/m2 or less, and has a sound transmission loss of less than 3 dB in a frequency range of 300 to 4000 Hz.
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机译:本发明提供了一种用于麦克风的传声膜,该传声膜布置在麦克风的声音收集开口处,以允许声音通过该膜传播,同时防止异物通过该开口进入麦克风。该麦克风用膜防止传统的声音传输膜难以阻挡的异物例如细粉尘和水蒸气的进入,并确保麦克风的性能。该麦克风用膜由无孔膜或包括无孔膜的多层膜组成,其表面密度为30g / m 2 Sup>或更小,并且传声损耗小于3。在300到4000 Hz的频率范围内为dB。
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