Browse Prior Art Database

REPROGRAPHIC SYSTEM WITH LOUDSPEAKER FOR NOISE CANCELLATION

IP.com Disclosure Number: IPCOM000026173D
Original Publication Date: 1990-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 63K

Publishing Venue

Xerox Disclosure Journal

Abstract

When one or more reprographic systems are frequently utilized in an enclosed area, the ambient noise from such systems may be of sufficient magnitude so as to prohibit normal conversation within the area. Furthermore, when such systems are utilized near personal work areas, the noise emanating from the reprographic systems may interfere with the work environment.

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XEROX DISCLOSURE JOURNAL

REPROGRAPHIC SYSTEM WITH Proposed Classification LOUDSPEAKER FOR NOISE U.S. C1.181/296 CANCELLATION Int. C1. FOln Ruediger W. Knodt

When one or more reprographic systems are frequently utilized in an enclosed area, the ambient noise from such systems may be of sufficient magnitude so as to prohibit normal conversation within the area. Furthermore, when such systems are utilized near personal work areas, the noise emanating from the reprographic systems may interfere with the work environment.

Accordingly, the present invention proposes a method to cancel the effects of the offending noise by introducing the same noise spectrum into the environment with an opposite phase. More specifically, the present invention would employ a microphone and recording capability in the reprographic system in order to record the annoying sound spectrum. Subsequently, the recorded spectrum may be replayed out of phase, via a loudspeaker and tone generator, to effectively cancel the inherent system noise. Furthermore, the introduction of a microphone into a reprographic system would enable additional diagnostic features within the machine. For instance, the system might be able to self-diagnose specific problems by analyzing the noise spectrum which it is emitting. Also, a microphone placed on such a system would enable the possibility of verbal dialogue with the system.

XEROX DISCLOSURE JOURNAL Vol. 15 No. 5 September/October 1990 293

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