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
音响系统设备:与便携式音频设备有关的耳机和耳机.最大声压级测量方法和限制注意事项.第2部分:与耳机的匹配(如果其中一个或两个单独提供)