往复式内燃机用声压测量声功率级第3部分:现场使用的测量方法

[中文适用范围]： 本标准规定了往复式内燃机声功率级的测量方法，是一种现场使用的测量方法。 本文件适用于 ISO 3046-1 应用领域内的所有往复式内燃机以及不存在合适国际标准的其他内燃机。 注：在本文件中，除非另有说明，往复式内燃机均称为发动机。 [外文原描述]： This document specifies the measurement method of sound power level for reciprocating internal combustion engines, which is a survey method for use in situ. This document applies to all reciprocating internal combustion engines falling within the field of application of ISO 3046-1 and other internal combustion engines where no suitable International Standard exists. NOTE In this document, reciprocating internal combustion engines are referred to as engines unless otherwise explained.