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Binaural active noise control using parametric array loudspeakers
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DOI：10.1016/j.apacoust.2016.09.021.png)
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This paper reports the binaural active noise control (ANC) system developed to deal with factory noise. The control points are located in the vicinity of the left and right ears of a worker sitting along the production line. Due to the complicated safety requirements in the factory, secondary sources and error microphones are not allowed to be placed near the worker. Therefore, the proposed ANC system employs the feedforward structure and adopts the parametric array loudspeakers (PALs) as the secondary sources. The PAL is a type of directional loudspeaker that generates a much narrower sound field as compared to the conventional loudspeaker. Once the proposed ANC system has been trained offline, the error microphones can be removed. The performance of the binaural ANC system is successfully demonstrated based on a digital signal processor (DSP) implementation. (C) 2016 Elsevier Ltd. All rights reserved.
Keyword:
Feedforward active noise control
Factory noise
Parametric array loudspeaker
Crosstalk
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