| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for automatically determining equalizing filter characteristics for an indoor communication system of a cabin for vehicle. <P>SOLUTION: An indoor communication system includes at least one loudspeaker and at least one microphone and comprises the steps of: generating a test signal to be set by loudspeakers, in particular, one loudspeaker, of the indoor communication system; receiving the test signal by a microphone, in particular, one microphone, of the indoor communication system to obtain a received test signal: automatically determining a transfer function in the frequency domain on the basis of the test signal and the received test signal; and automatically determining an equalizing filter characteristic on the basis of the transfer function. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
