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Waterproof sound-transmissive cover, waterproof sound-transmissive cover member and acoustic device
Waterproof sound-transmissive cover, waterproof sound-transmissive cover member and acoustic device
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机译:防水透声罩,防水透声罩构件和音响装置
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摘要
The waterproof sound-transmissive cover is characterized by providing a frequency response curve with a difference between a maximum sound pressure level and a minimum sound pressure level of 13.0 dB or less in the range of frequencies from 3 kHz to 8 kHz, and an insertion loss at 1 kHz of less than 14.0 dB, and said cover comprising: a porous film having (1) a water pressure resistance measured according to JIS L1092 water penetration test method B (high pressure method) of 20 kPa or more, and air permeability measured according to JIS L1096 method A (Frazier type method) of 3.0 cc/cm2·sec or more, and (2) a tensile strength measured according to ASTM standards D412 of 5.5N or more.
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机译:防水透声罩的特征在于,提供频率响应曲线,该频率响应曲线在3kHz至8kHz的频率范围内具有最大声压级与最小声压级之间的差值在13.0dB或更小以及插入损耗。在1kHz下小于14.0dB,并且所述盖包括:多孔膜,其具有(1)根据JIS L1092水渗透测试方法B(高压方法)测量的耐水压为20kPa以上,并且测量的透气度根据JIS L1096方法A(Frazier型方法)为3.0cc / cm 2 Sup>·sec以上,并且(2)根据ASTM标准D412测得的抗拉强度为5.5N以上。
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