DIN EN 50332-2-2004 音响系统设备:与便携音频设备相应的耳机和头戴式耳机.最大声压级测量方法和限制考虑.第2部分:单独提供或同时提供时头戴式耳机设置的匹配
Sound system equipment: Headphones and earphones associated with portable audio equipment - Maximum sound pressure level measurement methodology and limit considerations - Part 2: Matching of sets with headphones if either or both are offered separately;
This Part 2 of the multipart standard EN 50332 gives matching values for the use of battery-operated audio equipment and headphones/earphones defined for the use with those and with standardised connectors allowing to combine components of different manufacturers or different design sold separately in order to avoid possible hearing impairment by excessive sound pressure resulting from them.