ISO 13475的这一部分规定了在何种试验条件下，可听到静止物体的声发射水平 可以获得警告装置。适用于室外公共报警系统和音响系统中使用的警报器 户外使用的信号装置。 本测试规范的目的是能够为静止设备产生可靠的声发射水平测量值 在室外使用警报器。 ISO 13475的本部分不包括语音信息，也不包含针对特定警告的建议 信号。

This part of ISO 13475 specifies the test conditions under which the acoustic emission levels of stationary audible warning devices may be obtained. It is applicable to sirens for use in outdoor public warning systems and sound signalling devices for use outdoors. The purpose of this test code is to be able to produce reliable sound emission level measurements for stationary sirens to be used outdoors. This part of ISO 13475 does not cover spoken messages and contains no recommendations for specific warning signals.