Abstract
We have developed a method for separating airborne and structure-borne noise. Our method combines beamforming and adaptive filtering using active noise control. Separation is possible by calculating pressure distribution from beamforming, which uses data obtained from a microphone array and vibration sensors, and removing the vibration components using an adaptive filter This method can be used to efficiently solve noise and vibration problems when they are first detected and thus shorten the development of a machine. We used a shaker and speaker to demonstrate that our method is useful to separate noise sources. Results showed that our method separated airborne and structure-borne noise with an accuracy of ±2 dB or less.
