公开(公告)号：US09906849B2

公开(公告)日：2018-02-27

申请号：US15111417

申请日：2015-01-08

申请人： SEIREN CO., LTD.

发明人： Yoshiharu Kato ,  Katsumi Sakamoto ,  Yoshiyuki Yamada ,  Naoya Kishimoto

IPC分类号： H04R1/08 ,  H04R1/02 ,  G01H15/00

CPC分类号： H04R1/086 ,  G01H15/00 ,  H04R1/023

摘要： Provided is a sound-transmitting waterproof film having waterproof performance and stable sound-transmitting performance in a wide tonal range. The sound-transmitting waterproof film includes a porous film of a synthetic resin, and has a water pressure resistance of 10 to 400 kPa in accordance with a JIS L 1092 method B (a high water pressure method) and has an acoustic loss of less than 10 dB at a frequency of 1 kHz, an acoustic loss of less than 5 dB at a frequency of 2 kHz, and an acoustic loss of less than 5 dB at a frequency of 5 kHz in sound-transmitting performance tests.