초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] An active acoustic resonator for noise reduction, comprising:a sound generator having a membrane;a sensor for measuring membrane motion;an actuator for driving the membrane;a controller receiving the measured signal of the sensor and generating control signals for the act

[ What is claimed is:] [1.] An active acoustic resonator for noise reduction, comprising:a sound generator having a membrane;a sensor for measuring membrane motion;an actuator for driving the membrane;a controller receiving the measured signal of the sensor and generating control signals for the actuator, said controller having a transfer function (F.sub.R) which 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.