A designing system for adaptively characterizing an audio transmitting system has a white noise generating unit for generating a white noise signal. A speaker radiates the white noise generated by the white noise generating unit into an acoustic space. A microphone is placed at a predetermined position...http://www.google.de/patents/US6650756?utm_source=gb-gplus-sharePatent US6650756 - Method and apparatus for characterizing audio transmitting system, and method and apparatus for setting characteristics of audio filter
