Active noise and vibration cancellation system

Details Active noise and vibration cancellation system Active noise and vibration cancellation system

1994-05-18

1997-04-08

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, A61F 1106, H03B 2900

Patent

active

056195818

ABSTRACT:
An active noise and vibration control system (20) for cancellation of noise or vibration. The system (20) provides a system whereby the adaptation path and feedforward path are implemented in separate hardware. As a result, the computational burden on the digital signal processor (DSP) (28) is reduced allowing the DSP (28) to handle multiple inputs (22), error sensors (34), and transducers (32). In one embodiment, the processing of the input signal from sensor (22) takes place in a waveform generator (24) comprising a phase-locked loop, a frequency divider, a shift register, and at least one switched capacitor filter. In another embodiment the input signal processing takes place in separate feedforward circuitry including a field programmable gate array (64).

REFERENCES:
patent: 3588752 (1971-06-01), Hirshfield
patent: 3626315 (1971-12-01), Stirling et al.
patent: 3635427 (1972-01-01), Balke
patent: 3690607 (1972-09-01), Mard
patent: 3694776 (1972-09-01), Linder
patent: 3810038 (1974-05-01), Hershberg et al.
patent: 3854102 (1974-12-01), Seipel et al.
patent: 3867712 (1975-02-01), Harthill et al.
patent: 4122303 (1978-10-01), Chaplin et al.
patent: 4153815 (1979-05-01), Chaplin et al.
patent: 4232381 (1980-11-01), Rennick et al.
patent: 4328483 (1982-05-01), Swartz et al.
patent: 4417098 (1983-11-01), Chaplin et al.
patent: 4453143 (1984-06-01), Bennett
patent: 4473906 (1984-09-01), Warnaka et al.
patent: 4519084 (1985-05-01), Langseth
patent: 4562589 (1985-12-01), Warnka et al.
patent: 4626754 (1986-12-01), Habermann et al.
patent: 4677676 (1987-06-01), Eriksson
patent: 4689821 (1987-08-01), Salikuddin et al.
patent: 4825396 (1989-04-01), Gazsi
patent: 4866779 (1989-09-01), Kennedy et al.
patent: 4872127 (1989-10-01), Nolan
patent: 4878188 (1989-10-01), Ziegler, Jr.
patent: 4922530 (1990-05-01), Kenney et al.
patent: 5000415 (1991-03-01), Sandercock
patent: 5038269 (1991-08-01), Grimble et al.
patent: 5057993 (1991-10-01), Kanda
patent: 5133527 (1992-07-01), Chen et al.
patent: 5142240 (1992-08-01), Isota et al.
patent: 5170433 (1992-12-01), Elliott et al.
patent: 5179516 (1993-01-01), Choshitani et al.
PCT Patent Appl. No.PCT/US92?07802 having IPN WO 94/07212 published Mar. 31, 1994 entitled Sampled-Data Filter with Low Delay, assigned to Noise Cancellation Technologies.
Theory and Design of Adaptive Filters, Treichler et al., John Wiley & Sons, pp. 187-225.

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