| 摘要 |
A handset ( 1 ) for a communication unit is free from any howling problem even when an output of a speaker is considerably increased in use, wherein a conventional handset often suffers from the howling problem when the output of the speaker is considerably increased. In the handset ( 1 ) provided with a casing ( 11 ): a bone conduction speaker is housed in an upper portion of the casing ( 2 ); a microphone is housed in a lower portion of the casing ( 2 ); and, a sound aperture ( 5 ) of a microphone portion ( 4 ) of the casing ( 11 ), in which portion ( 4 ) the microphone is housed, is formed in a bottom surface of the casing ( 2 ) and/or a lower end side surface of the casing ( 2 ).
|
