Suppression of indoor transmitted noise by active noise control technology.

Abstract

Active noise control (ANC) is a technology that reduces the sound pressure of noise by causing sound waves of the same amplitude and opposite phase to interfere with the noise to be controlled. From the viewpoint of wavefront interference, a noise reduction effect can be expected for low-frequency noise with a long wavelength. We target environmental noise that is generated from factories and power generation facilities and propagates to general houses far away. We are studying how to reduce the energy transmitting into the room from walls and windows by applying ANC. In this paper, ANC is applied to the wall of a real house and the effect of reducing indoor noise is verified by experiments.