| 摘要 |
<p>A system for identifying a model of an acoustic system (10) in the presence of an external noise signal (11) is disclosed. The system includes an acoustic actuator (12) for generating controlled sound within the acoustic system (10). A sensor (16) receives the controlled sound and the external noise signal (11) and produces a sensed signal (18). A control system (22) generates a control signal (30) in response to an error signal (20). The control system (22) includes a system model (32) for generating an estimated response signal (34). The control system (22, 32) also generates the error signal (20) representing the difference between the sensed signal (18) and the estimated response signal (34). A masking threshold generator (50) receives the sensed signal (18) and the error signal (20) and produces spectral shaping parameters (52). A shaped signal generator (44) for receives the spectral shaping parameters (52) and produces a test signal (46) which is provided as an input to the control system (22, 32). A signal combining device (28) receives the test signal (46) and the control signal (30) and produces an actuator drive signal (14) for driving the acoustic actuator (12). <IMAGE></p> |
