Active control of outgoing noise fields in rooms

作者：Ma, Fei^*; Zhang, Wen; Abhayapala, Thushara D.

来源：Journal of the Acoustical Society of America, 2018, 144(3): 1589-1599.

DOI：10.1121/1.5055217

• SOUND
• DIMENSIONALITY
• ARRAY

Current active noise control systems can cancel noises in a duct effectively. However, they are insufficient for suppressing complex noise fields in time-varying rooms. This paper develops an active noise control system that can cancel tonal noise fields produced by a primary source in a room. The problem of tonal noise field control is formulated as estimating and canceling the outgoing field on a sphere surrounding the primary source. The proposed system limits the energy of the primary source radiating out of the sphere, thereby creating a global quiet zone inside the room. In addition, it removes the need for online secondary path estimation with reduced influence on desired sound fields in the room. A method for estimating the outgoing field on a sphere is presented, together with a wave-domain algorithm for controlling the outgoing field. Simulations and hardware demonstrations show the proposed system can reduce tonal noise fields in a room and over a wide frequency range.

• 出版日期2018-9
• 单位西北工业大学