To provide an acoustic playback apparatus for playing back a sound field, including radiation directivity.
An omni-azimuth frequency-directional acoustic apparatus includes a group of M pieces of microphones, turned from different directions to a sounding object; a group of N pieces of speakers, each having radiation directivity in a different direction; and an acoustic processing unit for creating N systems of speaker drive signals for the speaker group from output signals of M systems in the microphone group, and reproduces the directivity for each frequency of acoustic generated by the sounding object from the speaker group. Furthermore, in details, regarding a transfer function G of the group of the N pieces of speakers obtained as a matrix, an inverse matrix H at the location of the microphone group is found from a measurement of the transfer function G; in the acoustic processing unit, arithmetic processings are performed on acoustic signals inputted from the microphone group by using the inverse matrix H; and then the processed signal is made into N systems of acoustic signals and outputted. The oputputs of the N systems of the acoustic processing unit are applied to respective speakers in the speaker group, and acoustics is radiated.
| JP6900059 | Speaker system |
| WO/2001/022577 | MULTIPLE DRIVER, RESONANTLY-COUPLED LOUDSPEAKER |
KIMURA TOSHIYUKI
YAMAKATA YOKO
YANAGISAWA NOZOMI
| JP2001125578A | 2001-05-11 | |||
| JP2002186100A | 2002-06-28 | |||
| JPH05134660A | 1993-05-28 | |||
| JPH05276592A | 1993-10-22 |
Shinichi Fukuda
Takemichi Fukuda
Kyosuke Kato
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