| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound eliminating device for vocal exercise with which a user freely takes vocal exercise and the training of a musical instrument even in a general home having no soundproof equipment. SOLUTION: The sound eliminating device eliminates sounds by reading waveforms of voices generated by a human being or waveforms of sounds generated by a musical instrument, and by generating waveforms whose phases are reverse to those read waveforms. Moreover, the device adjusts the degree of sound elimination by amounts and phase differences to be generated or the waveforms to be generated. As a result, the sound eliminating device is provided which absorbs sounds even when the user generates sounds of voices or the musical instrument, and which does not make them sound around, and which can be placed at the corner of a room. COPYRIGHT: (C)2006,JPO&NCIPI
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