ISO 3745:2003 声学.声压测定噪声源音响功率级的.无回音室和半回音室的精确测定法

标准编号：ISO 3745:2003

中文名称：声学.声压测定噪声源音响功率级的.无回音室和半回音室的精确测定法

英文名称：Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for anechoic and hemi-anechoic rooms

发布日期：2003-12

标准范围

ISO 3745:2003规定了在消声室和半消声室中测量包围噪声源的测量表面上声压级的方法，以确定噪声源产生的声功率级或声能级。它给出了测试环境和仪器的要求，以及获得表面声压级的技术，从表面声压级计算声功率级或声能级，从而得出1级精度的结果。ISO 3745:2003中规定的方法适用于所有类型的噪声测量。噪声源可以是设备、机器、部件或子组件。被测光源的最大尺寸取决于用作包络测量面的假想球体（或半球）的半径。

ISO 3745:2003 specifies methods for measuring the sound pressure levels on a measurement surface enveloping a noise source in anechoic and hemi-anechoic rooms, in order to determine the sound power level or sound energy level produced by the noise source. It gives requirements for the test environment and instrumentation, as well as techniques for obtaining the surface sound pressure level from which the sound power level or sound energy level is calculated, leading to results which have a grade 1 accuracy.The methods specified in ISO 3745:2003 are suitable for measurements of all types of noise.The noise source can be a device, machine, component or sub-assembly. The maximum size of the source under test depends on the radius of the hypothetical sphere (or hemisphere) used as the enveloping measurement surface.

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