完全可转向的宽带光束造型器的设计与同心圆形超阵列的设计
Xueqin Luo1, Xudong Zhao1, Gongping Huang2
1Center of Intelligent Acoustics and Immersive Communications, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China.
The Journal of the Acoustical Society of America
|October 2, 2023
概括
本研究介绍了超级阵列,这是一种使用全向和双向麦克风的新型麦克风阵列设计. 这项创新增强了3D声音捕获,提高了电话会议等应用程序的性能.
科学领域:
- 声学 声学 在声学方面
- 信号处理 信号处理
- 阵列信号处理 阵列信号处理
背景情况:
- 带有全向传感器的同心圆形麦克风阵列在语音采集方面很常见.
- 由于空间采样不完整,传统的阵列在3D空间中表现下降,当声音源在平面之外时.
- 现有的光束造型器通常只能在传感器平面内进行引导.
研究的目的:
- 为了解决传统麦克风阵列的3D空间采样限制.
- 介绍一种新的方法,用于设计使用全向和双向麦克风组合的同心圆形麦克风阵列.
- 开发一种用于增强3D方向性和性能的梁成形方法.
主要方法:
- 新型同心圆形麦克风阵列的设计,将双向麦克风与全向麦克风相结合,称为"超级阵列".
- 开发一种波束成形技术,使频率不变的波束图案具有高定向性.
- 使用双向麦克风来弥补传统阵列中缺少的空间波元件.
主要成果:
- 超级数组与传统的全向数组相比,显示了更高的数组增益.
- 拟议的方法弥补了缺失的空间波元件,改善了3D声场采样.
- 开发的光束造型器在三维空间中完全可操纵,并实现频率不变的光束图案.
- 模拟和实验验证了超级阵列设计和光束成形方法的有效性.
结论:
- 在同心圆形阵列中整合双向麦克风显著提高了3D空间采样和阵列增益.
- 开发的超级阵列和束形技术为3D音频应用提供了卓越的性能.
- 这种方法克服了传统阵列的局限性,使得在3D空间中从任何方向获得强大的声音.
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