标准摘要
[中文适用范围]： 本标准规定了在给定要求的测试环境中，根据在包围噪声源（机械或设备）的表面上测量的声压级来确定噪声源的声功率级或声能级的方法。 使用这些测量值计算应用频率 A 加权的噪声源产生的声功率级（或者，在突发噪声或瞬态噪声发射的情况下，声能级）。 注：不同形状的测量表面可以对给定噪声源的声功率级产生不同的估计，适当起草的测试规范（参见 ISO 12001）给出了有关表面选择的详细信息。 [外文原描述]： ISO 3746:2010 specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping a noise source (machinery or equipment) in a test environment for which requirements are given. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source with frequency A-weighting applied is calculated using those measurements. The methods specified in ISO 3746:2010 are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. ISO 3746:2010 is applicable to all types and sizes of noise source (e.g. stationary or slowly moving plant, installation, machine, component or sub-assembly), provided the conditions for the measurements can be met. The test environments that are applicable for measurements made in accordance with ISO 3746:2010 can be located indoors or outdoors, with one or more sound-reflecting planes present on or near which the noise source under test is mounted. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3746:2010, for measurements made with frequency A-weighting applied. The uncertainty conforms with that of ISO 12001:1996, accuracy grade 3 (survey grade).
英文名称Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane