| 摘要 |
PROBLEM TO BE SOLVED: To appropriately prevent the reduction of volume in a low sound range due to sound leak in a sound communication apparatus having speakers to be functioned as receivers. SOLUTION: The apparatus includes: the speakers 16, 17 arranged in a case 3, performing a sound issuing operation, based on a common original signal, and functioned respectively as the receivers; and sound control means 13, 14 for controlling the sound issuing operation of the speakers 16, 17 in response to the original signal. Sound discharge holes 1, 2 are respectively formed at positions corresponding to the respective speakers 16, 17 in the case 3. The holes 1, 2 are mutually adjacently arranged so as to be covered together with the ear auricle of a user. When the sound in a high frequency band is outputted, the sound control means 13, 14 relatively differ the phases of the sound to be outputted from the speakers 16, 17, so as to cancel the sound. When the sound in a low frequency band is outputted, the means 13, 14 set the phases of the sound to be outputted from the speakers 16, 17 to be mutually equal. COPYRIGHT: (C)2008,JPO&INPIT
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