Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Within duct
Patent
1995-11-30
1998-10-27
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Within duct
381 717, 381 86, 181206, 181224, H03B 2900, A61F 1106
Patent
active
058287590
ABSTRACT:
A system and method for reducing noise from an internal combustion engine using a duct housing receiving induction air flow to the engine. A space is defined within the duct housing surrounding a speaker enclosure associated with a speaker facing an open space upstream of the annular space. A sound transducer at the axial location where the annular space opens into the open space generates electrical signals corresponding to engine noise propagating through the air induction ducting. The signals are amplified and phase shifted driving the speaker to output cancelling noises or sounds so as to at least reduce engine noise from the annular space. The speaker enclosure length is set to enhance speaker performance in selected frequency bands of engine noise.
REFERENCES:
patent: 3936606 (1976-02-01), Wanke
patent: 4410065 (1983-10-01), Harvey
patent: 4665549 (1987-05-01), Eriksson et al.
patent: 4876722 (1989-10-01), Dekker et al.
patent: 5170019 (1992-12-01), Loe
patent: 5176114 (1993-01-01), Brackett
patent: 5229556 (1993-07-01), Geddes
patent: 5319165 (1994-06-01), Geddes
patent: 5336856 (1994-08-01), Krider et al.
patent: 5426703 (1995-06-01), Hamabe et al.
patent: 5426705 (1995-06-01), Yokota et al.
patent: 5432857 (1995-07-01), Geddes
patent: 5446790 (1995-08-01), Tanaka et al.
patent: 5452577 (1995-09-01), Langer
patent: 5457749 (1995-10-01), Cain et al.
patent: 5466899 (1995-11-01), Geisenberger
patent: 5471537 (1995-11-01), Castwell
patent: 5513266 (1996-04-01), Zuroski
patent: 5541373 (1996-07-01), Cheng
patent: 5550334 (1996-08-01), Langley
patent: 5677958 (1997-10-01), Lehringer
patent: 5693918 (1997-12-01), Bremigan et al.
patent: 5703337 (1997-12-01), Geisenberger
Kuntz Curtis A.
Mei Xu
Siemens Electric Limited
LandOfFree
System and method for reducing engine noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for reducing engine noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for reducing engine noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1620355