| 摘要 |
PROBLEM TO BE SOLVED: To provide a removable earphone with a radio communication means, an electric power source circuit, a bone conduction speaker and an acoustic pipe installed therein, which is of integration type and allows an earphone carrier clearly to catch a bone conduction sound by audibility of bone conduction and to catch an ordinary airway sound as well. SOLUTION: The earphone includes: a radio communication means; a digital processing means for processing audio data obtained by radio communication; a digital/analog converter; a means for amplifying an analog signal; an electric power source circuit; a speaker; and an acoustic pipe. It can catch clearly an ordinary airway sound in addition to a bone conduction sound in a bone conduction system using a speaker. COPYRIGHT: (C)2009,JPO&INPIT
|
