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对于多通道参数阵列扬声器阵列的非线性声场控制方法.

Yunxi Zhu1,2, Liwen Qin1,2, Wenyao Ma1,2

  • 1Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences Beijing, 100190, People's Republic of China.

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此摘要是机器生成的。

本研究介绍了对参数阵列扬声器 (PAL) 的非线性声场控制,以克服室内声学挑战. 新方法在复杂环境中提高了指导性和声音质量.

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科学领域:

  • 声学 声学 在声学方面
  • 信号处理 信号处理
  • 非线性声学 非线性声学

背景情况:

  • 参数阵列扬声器 (PAL) 提供高定向性,但由于散射和反射,在室内环境中性能降低.
  • 现有的线性声场控制方法对PAL无效,因为频道之间存在非线性合,正如Westervelt方程所描述的那样.
  • 由于非线性声音转换效率低,PALs通常具有较低的辐射效率.

研究的目的:

  • 提出一种新的框架,用于在复杂的声学环境中控制PAL的非线性声场.
  • 开发一个声音控制算法,以提高PALs的辐射效率和声学对比度.
  • 解决线性控制方法在管理PAL产生的非线性声音场的局限性.

主要方法:

  • 基于韦斯特维尔特方程的非线性声场控制框架的开发.
  • 设计一个两阶段的非凸优化算法,以最大限度地提高辐射效率和声学对比度.
  • 利用模拟和实验验证来评估拟议的框架和算法.

主要成果:

  • 拟议的非线性控制框架有效地操纵PALs在复杂的声学环境中产生的声场.
  • 开发的算法成功地在黑暗区域抑制了不需要的可听声音,同时在明亮区域保留了所需的声音.
  • 在现实场景中展示了增强的声学对比度和改善PAL的性能,其中包括散射和反射.

结论:

  • 拟议的非线性声场控制框架和算法显著提高了PAL在挑战性室内声学中的性能.
  • 这种方法克服了线性控制方法的局限性,解决了PAL固有的非线性.
  • 该研究验证了非线性控制在实际应用中提高指导性和声音质量的有效性.