| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an on-vehicle speaker device for preventing drop of sound pressure of a speaker installed in a vehicle and releasing a temporarily-increased pneumatic pressure in an internal space of the vehicle to an external space. <P>SOLUTION: A bracket 11 is attached to a ventilation opening 5a formed in a cabin panel 5 of a vehicle 1, and a speaker 15 is attached to the bracket 11. A communication pipe 20 is attached to the bracket 11, and an internal space 6 and a rear space 7 are communicated by a communication passage 21 inside the pipe. A ventilation regulation portion 25 having a movable valve 26 is arranged at an external opening end 21b of the communication passage 21. The sound pressure generated from the speaker 15 is difficult to pass through the ventilation regulation portion 25, and the sound pressure generated in the internal space 6 is difficult to be suppressed. When the pressure in the internal space 6 temporarily becomes high, the air passes through the ventilation regulation portion 25 and the air can be released from the rear space 7 to an external space 8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
