DIN EN 50332-1 E:2013-10 音响系统设备:便携式音频播放设备用头戴式受话器和耳机 最大声压级测量方法 第1部分:一揽子包装设备的通用方法(草案)
Sound system equipment: Headphones and earphones associated with personal music players - Maximum sound pressure level measurement methodology - Part 1: General method for "one package equipment"