Noise suppressor in image forming apparatus and noise suppressin

Details Noise suppressor in image forming apparatus and noise suppressin Noise suppressor in image forming apparatus and noise suppressin

1996-10-18

1998-09-08

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

381 711, A61F 1106, H03B 2900

Patent

active

058057145

ABSTRACT:
A noise suppressor in an image forming apparatus suppresses noise from a drive mechanism during operation. An operation start signal of the drive mechanism is detected. A previously stored secondary sound having a reversed waveform to the waveform of the noise is generated at a noise suppressing position based on the drive operation start signal.

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patent: 5406383 (1995-04-01), Tanaka
patent: 5418629 (1995-05-01), Miura
patent: 5427102 (1995-06-01), Shimode et al.
patent: 5590206 (1996-12-01), An et al.

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