Controlled acoustic waveguide for soundproofing

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Within duct

Reexamination Certificate

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Details

C381S071900

Reexamination Certificate

active

06963647

ABSTRACT:
The invention relates to a controlled acoustic wave guide configured as an elongated hollow chamber (1) which via an opening (2) in its first face end (3) is connected to a sound-conducting channel (4). The longitudinal resonances of the hollow chamber (1) can be adjusted to a sound spectrum to be dampened. To this end diaphragm vibrations are detected by means of a microphone (10) which is positioned directly in front of the diaphragm (8) of at least one loud-speaker (9) at the second face-end (6) of the hollow chamber (1). The microphone signal is then inverted using an amplifier (11) and fed back to the loud-speaker (9) after amplification in accordance with a sensor (12) signal characterizing the sound spectrum in the channel (4).

REFERENCES:
patent: 4527282 (1985-07-01), Chaplin et al.
patent: 5233137 (1993-08-01), Geddes
patent: 5457749 (1995-10-01), Cain et al.
patent: 5550334 (1996-08-01), Langley
patent: 5574264 (1996-11-01), Takemori et al.
patent: 5619020 (1997-04-01), Jones et al.
patent: 6418227 (2002-07-01), Kuo
patent: 2003/0053635 (2003-03-01), Carme et al.
patent: 40 27 511 (1991-10-01), None
patent: 42 26 885 (1994-02-01), None
patent: 44 46 080 (1996-06-01), None
patent: 196 12 572 (1997-10-01), None
patent: 0 481 450 (1992-04-01), None
patent: WO 97/43754 (1997-11-01), None
International Search Report for PCT/EP 99/09966 (dated Apr. 20, 2000).

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