NOISE REDUCTION DEVICE, NOISE REDUCTION SYSTEM, AND NOISE REDUCTION CONTROL METHOD

NOISE REDUCTION DEVICE, NOISE REDUCTION SYSTEM, AND NOISE REDUCTION CONTROL METHOD

A noise reduction device (10) is connectable to a plurality of sound acquisition devices (7) and a plurality of control sound output devices (5) for reducing noises in a given space (10) where seats are arranged and a sound field can be formed. The device (10) includes a sound receiver (12), a contr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YAMAGUCHI, Takahiro, EZAKI, Toshihiro
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
SOUND-PRODUCING DEVICES
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Beschreibung
Zusammenfassung:A noise reduction device (10) is connectable to a plurality of sound acquisition devices (7) and a plurality of control sound output devices (5) for reducing noises in a given space (10) where seats are arranged and a sound field can be formed. The device (10) includes a sound receiver (12), a control sound generating unit (13), a control sound transmitter (14), a detecting unit (17), and an operation control unit (16). The sound receiver (12) receives a sound signal from at least two of the plurality of sound acquisition devices. The control sound generating unit (13) generates a control sound signal for reducing noise with respect to the sound signal. The control sound transmitter (14) outputs the control sound signal to each of control sound output devices. The detecting unit (17) detects a change of state of the sound field. The detecting unit (17) acquires, for example, seat information for specifying the reclining state of a seat. The operation control unit (16) controls the generation of the control sound signal by the control sound generating unit (13) based on the change of state of the sound field including the seat information.