Vehicle interior noise control of ultra-compact electric vehicle (Fundamental consideration using rectangular enclosure)

The demand for noise reduction inside a vehicle has been recently increasing in the pursuit of improved ride comfort. In consideration of requirement of quietness improvement and reduction of weight, an active noise control (ANC) system has been attracting much attention. This method is effective for noise with low frequency. In this study, we propose an ANC system by using the vibration of giant magnetostrictive actuator and we aim to reduce the noise level in an interior of a vehicle using this proposed ANC system. The giant magnetostrictive actuator has a high output that is sufficiently controllable inside a vehicle space and at the same time has high space efficiency. In this paper, the giant magnetostrictive actuator is installed at windshield of the enclosure that act as a vehicle, and the noise reduction effect to ANC were examined as the noise applied to the box from outside.