Abstract
This paper concerns the improvement of loudspeaker performance by shaping acoustic waveform in time domain using active control technique. In the audio-video equipment with thin-panel, the drive for ever thinner speakers typically results in shortcomings in sound quality compared with conventional box speakers. Because of unnecessary sounds radiated from speaker unit and box, it's impossible to reproduce the original sound perfectly. Then, the authors propose a method employing an adaptive impulse response control system with secondary speaker. This method is applied to the thinner box speaker and audio-video equipment of a thin type. The sound reproduction performance is verified on the basis of experiments.
