Active structural acoustic control for radiated sound power reduction of enclosure with vent holes based on radiation modes

다국어 초록 (Multilingual Abstract)

The radiated sound power in an enclosure with a vent hole is actively controlled by radiation mode. Active structural acoustic control (ASAC), which generates a sound field through the bending wave of a structure, is suitable for global noise reduction. However, ASAC applications have focused on reducing the transmission noise in completely enclosed structures. Herein, a new ASAC method for reducing the noise in an opened structure is proposed.
This method uses radiation mode and optimal control theory simultaneously to achieve sufficient sound power reduction with only a few actuators. The optimal vibration velocity of a panel is controlled by three radiation modes. The proposed method showed a maximum sound power reduction of 14 dB in three actuators, while the existing optimal control algorithm showed only a reduction of 1 dB. They can be used for active noise attenuation of various products with vent holes by reducing the number of actuators required.

참고문헌 (Reference)

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