Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle.
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本文是应用声学原理中的近场理论，通过工程技术实践探讨测量低频扬声器频响的一种方法。
In this paper a method base on the near-field theory of acoustics is used to measure the frequency response of the low-frequency loudspeaker through the engineering and technology practice.
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