ISO 13475的本部分规定了固定式声音警告的声发射水平的试验条件 可以获得设备。本方法适用于公共室外报警系统和 户外使用的声音信号装置。 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 用于警告户外的警报器。 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 by which the sound emission level of stationary audible warning devices can be obtained. The methods are applicable to sirens for use in public outdoor 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 used for warning outdoors. This part of ISO 13475 does not cover spoken messages and contains no recommendations for specific warning signals.