| 摘要 |
PROBLEM TO BE SOLVED: To provide an active noise cancellation system. SOLUTION: The system comprises: an adaptive filter receiving a reference signal representing the noise signal and comprising an output providing a compensation signal; a signal source providing a measurement signal; at least one acoustic actuator radiating the compensation signal and the measurement signal to the listening position; at least one microphone receiving a superposition of the radiated compensation signal, the measurement signal, and the noise signal at the listening position and providing a microphone signal; a secondary path comprising a secondary path system which represents the signal transmission path from an output of the adaptive filter to an output of the microphone; and an estimation unit for estimating a transfer characteristic of a secondary path system responsive to the measurement signal and the microphone signal. COPYRIGHT: (C)2010,JPO&INPIT |
