ISO 11904-1:2002规定了靠近耳朵的声源发出的声音干扰的基本框架测量方法。这些测量是用插入人体耳道的微型或探针麦克风进行的。随后将测量值转换为相应的自由场或漫射场水平。结果可以表示为自由场相关或扩散场相关的等效连续A加权声压级。这种技术被称为“真耳麦克风技术”（MIRE技术）。 ISO 11904-1:2002适用于近耳源的暴露，例如在设备测试期间或在工作场所使用耳机或带音频通信设施的听力保护器。 ISO 11904-1:2002适用于20 Hz至16 000 Hz的频率范围。

ISO 11904-1:2002 specifies basic framework measurement methods for sound immissions from sound sources placed close to the ear. These measurements are carried out with miniature or probe microphones inserted in the ear canals of human subjects. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results can be given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the microphone-in-real-ear technique (MIRE technique). ISO 11904-1:2002 is applicable to exposure from sources close to the ear, for example during equipment tests or at the workplace by earphones or hearing protectors with audio communication facilities. ISO 11904-1:2002 is applicable in the frequency range from 20 Hz to 16 000 Hz.