A compact microphone array system for outdoor low frequency noise measurements

用于户外低频噪声测量的紧凑型麦克风阵列系统

• 批准号: LP140100740
• 负责人: Prof Dr Xiaojun Qiu
• 金额: $ 13.95万
• 依托单位: University of Technology Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2014
• 资助国家: 澳大利亚
• 起止时间: 2014-09-11 至 2019-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP140100740
• 关键词: compact; microphone; array; system; outdoor

To investigate the impact of wind farm noise on surrounding communities, the sound level caused by wind turbines must be accurately measured, which sometimes is hard due to wind induced noise and other interference noise. This project aims to propose a novel compact microphone array solution, where the wind induced noise is attenuated by a specially designed windproof shell first, and then the residual wind induced noise and other interference noise are further filtered out by a specific adaptive noise cancellation algorithm based on the spherical and differential microphone array structure. With the proposed system, the measurement configuration size is expected to be reduced from the current few metres to less than 10 centimetres, and with better accuracy.

为了调查风电场噪声对周围社区的影响，必须准确测量风力机产生的声级，有时由于风致噪声和其他干扰噪声，这一测量很难实现。本项目旨在提出一种新颖的紧凑型麦克风阵列解决方案，该方案首先通过特殊设计的防风外壳来衰减风致噪声，然后通过基于球面和差分麦克风阵列结构的特定自适应噪声抵消算法来进一步滤除残留的风致噪声和其他干扰噪声。有了拟议的系统，测量配置尺寸预计将从目前的几米减少到不到10厘米，并具有更高的精度。