标准摘要
[中文适用范围]： ISO 3743 的这一部分规定了通过比较安装在硬墙测试室中的声源（机械或设备）发出的测量声压级来确定噪声源的声功率级或声能级的方法，其特征是指定的，与来自校准参考声源的那些。 使用这些测量值可以计算噪声源在宽度为 1 个倍频程的频带中产生的声功率级（或者，在突发噪声或瞬态噪声发射的情况下，声能级）。 应用 A 计权的声功率级或声能级是使用倍频程级别计算的。 [外文原描述]： ISO 3743-1:2010 specifies methods for determining the sound power level or sound energy level of a noise source by comparing measured sound pressure levels emitted by this source (machinery or equipment) mounted in a hard-walled test room, the characteristics of which are specified, with those from a calibrated reference sound source. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands of width one octave, is calculated using those measurements. The sound power level or sound energy level with frequency A-weighting applied is calculated using the octave-band levels. The method specified in ISO 3743-1:2010 is suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. The noise source under test may be a device, machine, component or sub-assembly. The maximum size of the source depends upon the size of the room used for the acoustical measurements (see 4.2). The test environment that is applicable for measurements made in accordance with ISO 3743-1:2010 is a hard-walled test room with prescribed acoustical characteristics. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3743-1:2010, for measurements made in frequency octave bands and for A-weighted frequency calculations performed on them. The uncertainty conforms to ISO 12001:1996, accuracy grade 2 (engineering grade).
英文名称Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for small movable sources in reverberant fields — Part 1: Comparison method for a hard-walled test room