Active acoustic resonator for abating noise

Details Active acoustic resonator for abating noise Active acoustic resonator for abating noise

1998-03-17

2000-11-21

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

381 718, A61F 1106, G10K 1116, H03B 2900

Patent

active

061513962

ABSTRACT:
An active acoustic resonator is provided for noise reduction, with a sound generator having a membrane, with a sensor for measuring the membrane motion, with an actuator for driving the membrane, as well as with a controller receiving the measured signal of the sensor and generating control signals for the actuator. A transfer function (F.sub.R) of the controller is proportional to a quotient, whose numerator (F.sub.BP) has the transfer behavior of a band pass filter with variable center frequency (f.sub.0), and whose denominator represents the transfer function (F.sub.U) of the actuator.

REFERENCES:
patent: 5953428 (1999-09-01), Silverberg

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