ISO 3743-1:2010 声学 噪声源声功率级的测定 混响声场中小型可移动声源的工程法 第1部分：硬壁试验室中的比较法

标准编号：ISO 3743-1:2010

中文名称：声学 噪声源声功率级的测定 混响声场中小型可移动声源的工程法 第1部分：硬壁试验室中的比较法

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

发布日期：2010-10

标准范围

ISO 3743-1:2010规定了通过比较安装在硬壁试验室（规定了其特性）中的噪声源（机械或设备）发出的测量声压级与校准参考声源发出的声压级来确定噪声源声功率级或声能级的方法。噪声源产生的声功率级（或者，在噪声爆发或瞬态噪声发射的情况下，声能级）在宽度为1倍频程的频带内，使用这些测量值进行计算。频率为A的声功率级或声能级-应用的权重使用倍频带电平计算。ISO 3743-1:2010中规定的方法适用于ISO 12001中定义的所有类型的噪声（稳定、非稳定、波动、孤立的声能爆发等）。被测噪声源可能是装置、机器、部件或子组件。声源的最大尺寸取决于用于声学测量的房间大小（见4.2）。适用于根据ISO 3743-1:2010进行测量的试验环境是具有规定声学特性的硬壁试验室。给出了根据ISO 3743确定的声功率级和声能级的不确定度信息-1:2010，用于倍频程频带内的测量和对其进行A加权频率计算。不确定度符合ISO 12001:1996，精度等级2（工程级）。

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).

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