Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit
Reexamination Certificate
2006-03-28
2006-03-28
Kuntz, Curtis (Department: 2643)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Noise compensation circuit
C381S318000, C381S321000
Reexamination Certificate
active
07020297
ABSTRACT:
A new subband feedback cancellation scheme is proposed, capable of providing additional stable gain without introducing audible artifacts. The subband feedback cancellation scheme employs a cascade of two narrow-band filters Ai(Z) and Bi(Z) along with a fixed delay, instead of a single filter Wi(Z) and a delay to represent the feedback path in each subband. The first filter, Ai(Z), is called the training filter, and models the static portion of the feedback path in ithsubband, including microphone, receiver, ear canal resonance, and other relatively static parameters. The training filter can be implemented as a FIR filter or as an IIR filter. The second filter, BI(Z), is called a tracking filter and is typically implemented as a FIR filter with fewer taps than the training filter. This second filter tracks the variations of the feedback path in the ithsubband caused by jaw movement or objects close to the ears of the user.
REFERENCES:
patent: 3578913 (1971-05-01), Ufkes
patent: 3685009 (1972-08-01), Gleming, Jr.
patent: 3763333 (1973-10-01), Lichowsky
patent: 3928733 (1975-12-01), Hueber
patent: 4025721 (1977-05-01), Graupe et al.
patent: 4061875 (1977-12-01), Freifeld et al.
patent: 4122303 (1978-10-01), Chaplin et al.
patent: 4135590 (1979-01-01), Gaulder
patent: 4185168 (1980-01-01), Graupe et al.
patent: 4187472 (1980-02-01), Yum
patent: 4188667 (1980-02-01), Graupe et al.
patent: 4216430 (1980-08-01), Amazawa et al.
patent: 4238746 (1980-12-01), McCool et al.
patent: 4243935 (1981-01-01), McCool et al.
patent: 4249128 (1981-02-01), Karbowski
patent: 4326172 (1982-04-01), Schmidt
patent: 4355368 (1982-10-01), Zeidler et al.
patent: 4368459 (1983-01-01), Sapora
patent: 4494074 (1985-01-01), Bose
patent: 4548082 (1985-10-01), Engelbretson et al.
patent: 4589133 (1986-05-01), Swinbanks
patent: 4589137 (1986-05-01), Miller
patent: 4602337 (1986-07-01), Cox
patent: 4628529 (1986-12-01), Borth et al.
patent: 4630305 (1986-12-01), Borth et al.
patent: 4654871 (1987-03-01), Chaplin et al.
patent: 4658426 (1987-04-01), Chabries et al.
patent: 4718099 (1988-01-01), Hotvet
patent: 4723294 (1988-02-01), Taguchi
patent: 4759071 (1988-07-01), Heide
patent: 4783818 (1988-11-01), Graupe et al.
patent: 4802227 (1989-01-01), Elko et al.
patent: 4845757 (1989-07-01), Wagner
patent: 4878188 (1989-10-01), Ziegler, Jr.
patent: 4912767 (1990-03-01), Chang
patent: 4939685 (1990-07-01), Feintuch
patent: 4953217 (1990-08-01), Twiney et al.
patent: 4956867 (1990-09-01), Zurek et al.
patent: 4985925 (1991-01-01), Langberg et al.
patent: 5016280 (1991-05-01), Engebretson et al.
patent: 5027306 (1991-06-01), Dattorro et al.
patent: 5091952 (1992-02-01), Williamson et al.
patent: 5097510 (1992-03-01), Graupe
patent: 5105377 (1992-04-01), Ziegler, Jr.
patent: 5111419 (1992-05-01), Morley, Jr. et al.
patent: 5165017 (1992-11-01), Eddington et al.
patent: 5177755 (1993-01-01), Johnson
patent: 5225836 (1993-07-01), Morley, Jr. et al.
patent: 5233665 (1993-08-01), Vaughn et al.
patent: 5251263 (1993-10-01), Andrea et al.
patent: 5259033 (1993-11-01), Goodings et al.
patent: 5263019 (1993-11-01), Chu
patent: 5291525 (1994-03-01), Funderburk et al.
patent: 5305307 (1994-04-01), Chu
patent: 5355418 (1994-10-01), Kelsey et al.
patent: 5357251 (1994-10-01), Morley, Jr. et al.
patent: 5396560 (1995-03-01), Arcos et al.
patent: 5402496 (1995-03-01), Soli et al.
patent: 5412735 (1995-05-01), Engebretson et al.
patent: 5452361 (1995-09-01), Jones
patent: 5473684 (1995-12-01), Bartlett et al.
patent: 5475759 (1995-12-01), Engebretson
patent: 5500902 (1996-03-01), Stockham, Jr. et al.
patent: 5511128 (1996-04-01), Lindemann
patent: 5539831 (1996-07-01), Harley
patent: 5544250 (1996-08-01), Urbanski
patent: 5600729 (1997-02-01), Darlington et al.
patent: 5651071 (1997-07-01), Lindemann et al.
patent: 5677987 (1997-10-01), Seki et al.
patent: 5680467 (1997-10-01), Hansen
patent: 5689572 (1997-11-01), Ohki et al.
patent: 5710820 (1998-01-01), Martin et al.
patent: 5794187 (1998-08-01), Franklin et al.
patent: 5825898 (1998-10-01), Marash
patent: 5838801 (1998-11-01), Ishige et al.
patent: 5848169 (1998-12-01), Clark, Jr. et al.
patent: 5848171 (1998-12-01), Stockham, Jr. et al.
patent: 5867581 (1999-02-01), Obara
patent: 5937070 (1999-08-01), Todter et al.
patent: 6023517 (2000-02-01), Ishige
patent: 6035048 (2000-03-01), Diethorn
patent: 6044162 (2000-03-01), Mead et al.
patent: 6072884 (2000-06-01), Kates
patent: 6072885 (2000-06-01), Stockham, Jr. et al.
patent: 6118878 (2000-09-01), Jones
patent: 6163287 (2000-12-01), Huang
patent: 6173063 (2001-01-01), Melanson
patent: 6219427 (2001-04-01), Kates et al.
patent: 6278786 (2001-08-01), McIntosh
patent: 6396930 (2002-05-01), Vaudrey et al.
patent: 0 064 042 (1986-01-01), None
patent: 0 823 829 (1998-11-01), None
patent: 0 930 801 (1998-12-01), None
patent: WO 93/20668 (1993-10-01), None
patent: WO 94/09604 (1994-04-01), None
patent: 96/35314 (1996-11-01), None
patent: 97/50186 (1997-12-01), None
patent: 98/28943 (1998-07-01), None
patent: WO 98/43567 (1998-10-01), None
patent: 98/47227 (1998-10-01), None
patent: 98/47314 (1998-10-01), None
patent: 99/26453 (1999-05-01), None
patent: WO 99/45741 (1999-09-01), None
Berouti, et al., “Enhancement of Speech Corrupted by Acoustic Noise”, Apr. 1979. Proceedings of the IEEE Conference on Acoustics, Speech and Signal Processing, pp. 208-211.
Boll, S., “Suppression of Acoustic Noise in Speech Using Spectral Subtraction,” Apr. 1979, IEEE Trans. On ASSP. vol. ASSP-27, pp. 113-120.
Brey, Robert H. et al., “Improvement in Speech Intelligibility in Noise Employing an Adaptive Filter with Normal and Hearing-Impaired Subjects,” Journal of Rehabilitation Research and Development, vol. 24, No. 4, pp. 75-86.
Bustamante et al., “Measurement and Adaptive Suppression of Acoustic Feedback in Hearing Aids”, Nicolet Instruments, Madison, Wisconsin, pp. 2017-2020.
Chabries, Douglas M. et al., “Application of Adaptive Digital Signal Processing to Speech Enhancement for the Hearing Impaired,” Journal of Rehabilitation Research and Development, vol. 24, No. 4, pp. 65-74.
Chabries, et al., Application of a Human Auditory Model to Loudness Perception and Hearing Compensation:, 1995, IEEE, pp. 3527-3530.
Chabries, et al., “Noise Reduction by Amplitude Warping in the Spectral Domain in a Model-Based Algorithm”, Jun. 11, 1997, Etymotic Update, No. 15.
Crozier, P. M. et al., “Speech Enhancement Employing Spectral Subtraction and Linear Predictive Analysis,” 1993, Electronic Letters, 29(12): 1094-1095.
“Delta-Sigma Overview”, Fall 1996, ECE 627, pp. 1-29.
Esterman, Pius, “Feedback Cancellation in Hearing Aids: Results from Using Frequency-Domain Adaptive Filters”, Institute for Signal and Information Processing, pp. 257-260
Etter, et al., “Noise Reduction by Noise-Adaptive Spectral Magnitude Expansion”, May 1994, J. Audio Eng. Soc., vol. 42, No. 5, pp. 341-348.
George, E. Bryan, “Single-Sensor Speech Enhancement Using a Soft-Decision/Variable Attenuation Algorithm”, 1995, IEEE, pp. 816-819.
Gustafsson, et al., “A Novel Psychoacoustically Motivated Audio Enhancement Algorithm Preserving Background Noise Characteristics”, 1998, IEEE, pp. 397-400.
Kaelin, et al., “A digital Frequency-Domain Implementation of a Very High Gain Hearing Aid with Compensation for Recruitment of Loudness and Acoustic Echo Cancellation”, 1998, Elsevier Science B.V., Signal Processing 64, pp. 71-85.
Karema, et al., “An Oversampled Sigma-Delta A/D Converter Circuit Using Two-Stage Fourth Order Modulator”, 1990, IEEE, pp. 3279-3282.
Kates, James M., “Feedback Cancellation in Hearing Aids: Results from a Computer Simulation”, 1991, IEEE, Transactions on Signal Processing, vol. 39, No. 3, pp. 553-562.
Killion, Mead, “The SIN Report: Circuits Haven't Solved the Hearing-in-Noise Problem,” Oct. 1997, The Hearing Journal, vol. 50, No. 20, pp. 28-34.
Kuo, et al., “I
Fang Xiaoling
Giles Brad
Wilson Gerald
Dabney Phylesha
Kuntz Curtis
Ritchie David B.
Sonic Innovations, Inc.
Thelen Reid & Priest LLP
LandOfFree
Subband acoustic feedback cancellation in hearing aids does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Subband acoustic feedback cancellation in hearing aids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subband acoustic feedback cancellation in hearing aids will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3611420