High Attenuated Audio-beam Based on Near-focused Sideband Wave with Parametric Array Loudspeakers
High Attenuated Audio-beam Based on Near-focused Sideband Wave with Parametric Array Loudspeakers
复制标题
DOI：
10.1109/gcce46687.2019.9015227
复制
发表时间：
2019-10
期刊：
影响因子：
--
通讯作者：
Makoto Shimokata;M. Nakayama;T. Nishiura
中科院分区：
文献类型：
--
作者：
Makoto Shimokata;M. Nakayama;T. Nishiura
研究了参量阵列扬声器（帕尔斯）仅在其近区再现可听声的方法。然而，由于边带波互调失真，解调的可听声音的声压级（SPL）在PAL的远区没有充分衰减。此外，由于来自载波和边带波的干扰，取决于PAL的近区中的收听点，解调的可听声音不具有足够的SPL。为了解决这些问题，我们提出了一种基于帕尔斯的近聚焦边带波的高衰减声束方法。实验结果表明，该方法能够在PAL近区放大可闻声的SPL，在远区充分衰减可闻声的SPL。
A study on reproducing audible sound with parametric array loudspeakers (PALs) only in the near area of them has been conducted. However, the sound pressure level (SPL) of demodulated audible sound does not sufficiently attenuate in the far area of the PAL because of the sideband wave intermodulation distortion. Furthermore, the demodulated audible sound does not have sufficient SPL depending on the listening point in the near area of the PAL because of the interference from the carrier and sideband waves. To solve these problems, we propose a high attenuated audio-beam method based on the near-focused sideband wave with PALs. With the proposed method, the SPL of the demodulated audible sound is amplified in the near area of the PAL and sufficiently attenuates in the far area of it. Experimental results indicate the effectiveness of the proposed method.