Loudspeaker distortion reduction systems

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H04R 304

Patent

active

040525600

ABSTRACT:
In order to improve the response of a signal transducer of the type which converts an electrical signal into a different form of energy, for example a loudspeaker, and in particular to cause the output produced by the transducer to constitute a more faithful reproduction of the original electrical signal, the input of the signal transducer is connected to a first signal path which provides a signal component proportional to the signal to be reproduced, and to at least one second signal path connected in parallel with, and conducting signals in the same direction as, the first signal conducting path and producing a second signal component which is proportional to a function of at least one of the time derivative and the time integral of the original signal to be reproduced. In preferred embodiments of the invention, the second signal path includes both a time differentiator and a time integrator, connected together in parallel and each adjusted to provide a signal component which acts to substantially compensate for one respective major source of distortion inherent in the transducer.

REFERENCES:
patent: 2701328 (1955-02-01), Woodruff
patent: 3073524 (1963-01-01), Ford
patent: 3755749 (1973-08-01), Van Ryswyk et al.
patent: 3940709 (1976-02-01), Heaslett

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