| 摘要 |
A COMMUNICATION APPARATUS (56) INCLUDES A SUPPORT STRUCTURE (41) THAT IS FASTENABLE TO A SAFETY HELMET (58). A VIBRATION CONDUCTION MICROPHONE (42) IS CARRIED BY THE SUPPORT STRUCTURE (41). A SPEAKER ENCLOSURE (43) IS ALSO CARRIED BY THE SUPPORT STRUCTURE (41). THE VIBRATION CONDUCTION MICROPHONE (42) AND THE SPEAKER ENCLOSURE (43) ARE POSITIONED SO THAT, WHEN THE SUPPORT STRUCTURE (41) IS FASTENED TO THE SAFETY HELMET (58), THE VIBRATION CONDUCTION MICROPHONE (42) AND THE SPEAKER ENCLOSURE (43) COME INTO CONTACT WITH A REAR OF A WEARER'S HEAD, IN USE.
|
