| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus and method for making adjustment to a noise condition in order to control the volume and other variables of a desired signal offered in a monitored space. <P>SOLUTION: The adjustment is made by picking up a monitoring signal occurring at a monitoring point and dividing the signal into a desired-signal component and a noise-signal component. These two components become the bases when making the adjustment afterward. In addition, a distortion adaptive filter is provided. The distortion adaptive filter is used for extracting a signal of a noise, which is used as a component constituting a part of the bases for the adjustment afterward. The extracted noise signal is corrected and used for controlling a dynamic controller that makes adjustment to the volume. <P>COPYRIGHT: (C)2012,JPO&INPIT |
