Tsutomu Hamabe

TL;DR: In this article, an adaptive digital filter 13 filters the output signal of the signal component selecting means 45 according to a specific filter coefficient and outputs a signal for driving a control sound source.

TL;DR: In this article, the authors proposed to suppress the increment of arithmetic load on an arithmetic unit and attain noise reduction precisely by predicting the divergence of a control sound source based on the update quantity of the filter coefficient of an adaptive filter.

TL;DR: In this paper, an active noise eliminating system consisting of microphones for detecting residual noise, speakers for generating noise elimination sound for interference with the residual noise and a noise generating condition sensor for noise condition, a controller for generating noises elimination signals inputted to the speakers and determined by the detected residual noise signals and the detected noise condition signal in accordance with a control algorithm including transfer functions between the speaker and microphones respectively.

TL;DR: In this article, an apparatus for reducing noise for an interior of enclosed space, e.g., a vehicular compartment using an FIR adaptive digital filter is disclosed in which a control circuit is provided which outputs drive signals to a plurality of loud speakers which generate control sounds to interfer with a noise sound propagated in the interior.

TL;DR: In this paper, an engine mounting system called ACM (Active Control engine Mount) system was proposed to reduce idling vibration and booming noise in automobile engines, which is called active control engine mount (ACM) system.