Audio noise cancellation system for a sensor in an...

Details Audio noise cancellation system for a sensor in an... Audio noise cancellation system for a sensor in an...

2006-10-24

2006-10-24

Lee, Ping (Department: 2615)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S086000, C280S735000, C340S438000

Reexamination Certificate

active

07127073

ABSTRACT:
An assembly includes a seat60having a seat base64, an occupant sensor positioned in the seat base, said occupant sensor comprising a fluid filled bladder coupled to a pressure sensor, said pressure sensor generating a pressure signal, and an audio system having an electrical output coupled to a speaker, said speaker positioned near the seat, said speaker audibly coupled to the bladder. The assembly includes a compensation circuit (12) for a sensor (22) generating electrical sensor output near a speaker (18) of an audio system (16) that comprises an inverting circuit (26) coupled to the electrical output (16) of the audio system. The inverting circuit (26) generates an inverted electrical signal corresponding to a speaker audio output. A sensor controller (24) coupled to the inverting circuit (26) and the sensor (22) generates a compensated electrical output in response to the electrical sensor output and the inverted electrical signal.

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