标准摘要
[中文适用范围]： IEC 61400 的这一部分介绍了能够表征风力涡轮机噪声排放特征的测量程序。这涉及在靠近机器@的位置使用适合噪声发射评估的测量方法，以避免由于声音传播@但又足够远以允许有限的源尺寸而产生的错误。所描述的程序在某些方面与社区噪声研究中噪声评估所采用的程序不同。它们旨在促进风力涡轮机噪声相对于一系列风速和方向的表征。测量程序的标准化也将有助于不同风力涡轮机之间的比较。这些程序提出的方法将使单个风力涡轮机的噪声排放能够以一致且准确的方式进行表征。这些程序包括以下内容： ?声学测量位置的定位； ？获取声学@气象@和相关风力涡轮机运行数据的要求； ？分析获得的数据和数据报告的内容；和 ？用于进行环境评估的特定声发射参数@和相关描述符的定义。本国际标准不限于特定尺寸或类型的风力涡轮机。本标准中描述的程序可以对风力涡轮机的噪声排放进行全面的描述。附件 F 描述了一种用于小型风力涡轮机的方法。 [外文原描述]： IEC 61400-11:2012 presents measurement procedures that enable noise emissions of a wind turbine to be characterised. This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far away enough to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to facilitate characterisation of wind turbine noise with respect to a range of wind speeds and directions. Standardisation of measurement procedures will also facilitate comparisons between different wind turbines. This new edition constitutes a technical revision, introducing new principles for data reduction procedures.
英文名称Wind turbines - Part 11: Acoustic noise measurement techniques