Title:
SOUND GENERATING/COLLECTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/001659
Kind Code:
A1
Abstract:
A sound generating/collecting device capable of collecting/outputting the
voice of a speaker with a high S/N ratio by eliminating the influence of the aliasing
sound even though the device has a simple structure. A signal difference circuit
(191) outputs difference signal (MS1 to MS4) between sound collection beam signals
(MB11 to MB14) and sound collection beam signals (MB21 to MB24), respectively.
A level comparator (195) selects the difference signal having the highest
maximum level. A signal selecting circuit (196) selects the sound collection
beam signals (MB1x, MB2x) of the difference signal (MS) selected and specified
by the level comparator (195). A subtractor (199) subtracts the sound collection
beam signal (MB2x) from the sound collection beam signal (MB1x) and outputs the
resultant signal. Thus, the main component of the aliasing sound is removed
from the sound collection beam signal.
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Inventors:
ISHIBASHI, Toshiaki (())
石橋 利晃 (())
TANAKA, Ryo (())
石橋 利晃 (())
TANAKA, Ryo (())
Application Number:
JP2007/062393
Publication Date:
January 03, 2008
Filing Date:
June 20, 2007
Export Citation:
Assignee:
YAMAHA CORPORATION (10-1, Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 4308650, JP)
ヤマハ株式会社 (〒50 静岡県浜松市中区中沢町１０番１号 Shizuoka, 4308650, JP)
ISHIBASHI, Toshiaki (())
石橋 利晃 (())
ヤマハ株式会社 (〒50 静岡県浜松市中区中沢町１０番１号 Shizuoka, 4308650, JP)
ISHIBASHI, Toshiaki (())
石橋 利晃 (())
International Classes:
H04R3/02; H04M3/56; H04R1/40
Attorney, Agent or Firm:
YAZAWA, Kiyozumi (Eikoh Patent Office, 7-13 Nishi-Shimbashi 1-chom, Minato-ku Tokyo 03, 1050003, JP)
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