ISO 3743是ISO 3740系列中的一个，它规定了确定声音的各种方法 机器、设备和子组件的功率水平。这些基本标准规定了声学性能 适用于不同试验环境的测量要求如表0.1所示。 当选择ISO 3740系列的其中一种方法时，有必要选择最合适的方法 适用于噪声测试的条件和目的。协助解决这一问题的一般准则 ISO 3740中提供了选择。ISO 3740系列仅给出了有关 被测机器或设备的操作和安装条件。应提供参考 适用于特定类型机器或设备的噪声测试代码（如有） 安装和操作条件规范。

ISO 3743 is one of the ISO 3740 series, which specifies various methods for determining the sound power levels of machines, equipment and sub-assemblies. These basic standards specify the acoustical requirements for measurements appropriate for different test environments as shown in table 0.1. When selecting one of the methods of the ISO 3740 series, it is necessary to select the most appropriate for the conditions and purposes of the noise test. General guidelines to assist in the selection are provided in ISO 3740. The ISO 3740 series gives only general principles regarding the operating and mounting conditions of the machine or equipment under test. Reference should be made to the noise test code for a specific type of machine or equipment, if available, for specifications on mounting and operating conditions.