Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate
2007-03-13
2007-03-13
Tran, Sinh (Department: 2615)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
C381S086000, C381S089000, C381S080000
Reexamination Certificate
active
09486864
ABSTRACT:
A sound-amplification apparatus comprises: an acoustic signal source for outputting an acoustic signal; an amplified sound source for receiving the acoustic signal from the acoustic signal source and radiating an amplified sound; a control sound source provided in a vicinity of the amplified sound source for radiating a control sound; and signal processing means for producing a control sound signal by controlling at least one of an amplitude and a phase of the acoustic signal from the acoustic signal source so that an acoustic space having a desired directionality is formed by interference between the amplified sound and the control sound, and providing the control sound signal to the control sound source.
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European Search Report dated Jul. 29, 2005.
Hashimoto Hiroyuki
Kakuhari Isao
Terai Kenichi
Faulk Devona E.
Matsushita Electric - Industrial Co., Ltd.
Snell & Wilmer L.L.P.
Tran Sinh
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