| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of surely solving a phase delay between a control speaker and a monitoring microphone to ensure sound reduction by enabling to obtain a proper acoustic transfer function while preventing generation of random noise as much as possible. SOLUTION: Respective transfer functions between monitoring microphones 4 and 13 and control speakers 5 and 14 are measured according to operation of a remote control 20. The filter coefficient of an adaptive filter 30 is corrected according to the measured acoustic transfer function C. COPYRIGHT: (C)2005,JPO&NCIPI |
