| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic system capable of highly accurately and efficiently reducing noise in frequencies from a low band up to a medium-high band. <P>SOLUTION: The acoustic system 1 includes a reference microphone noise correction means 13 capable of smoothing frequency characteristics by applying filter processing to a sound to be muted which is collected by a reference microphone 7, and correction microphone noise correction means 14, 15 capable of smoothing the frequency characteristics by applying filter processing to sounds collected by correction microphones 5L, 5R arranged in the vicinity of user's ear positions. Further, the acoustic system 1 includes acoustic correction means 11, 12 for generating acoustic signals for reducing noise in the vicinity of the user's ear positions on the basis of sound filtered by the reference microphone noise correction means 13 and sound filtered by the correction microphone correction means 14, 15, and speakers 4L, 4R for outputting the acoustic signals. <P>COPYRIGHT: (C)2008,JPO&INPIT |
