Adaptive arrangement for correcting the transfer characteristic

Details Adaptive arrangement for correcting the transfer characteristic Adaptive arrangement for correcting the transfer characteristic

1994-09-19

1998-09-29

Kuntz, Curtis

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 98, 381 59, H04R 300

Patent

active

058155856

ABSTRACT:
An arrangement is provided for converting an electric signal into an acoustic or a mechanic signal comprising a transducer (1) and an electric circuit connected to the terminals of the transducer (1). An adaptive correction filter (3) compensates for linear and nonlinear distortions of the transducer (1) and realizes a desired overall transfer characteristic of the arrangement. An adaptive detector circuit (2) connected between the filter output (7) and the transducer's terminals provides a motional signal of the transducer at output (11) without using an additional mechanic or acoustic sensor. Reference filter (6) and comparator (13) compare the detected motional signal with a desired signal and provide an error signal e(t) for adaptively adjusting both the correction filter (3) and detector circuit (2) to the transducer. This arrangement dispenses from pre-training and copes with nonlinear and changing transducer characteristics.

REFERENCES:
patent: 4969195 (1990-11-01), Nolo
patent: 5068903 (1991-11-01), Walker
patent: 5438625 (1995-08-01), Klippel

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