本规范涵盖了带刚性头带的头戴式耳机麦克风的要求。这些部件符合用于防止危险噪声暴露的通信设备的既定要求，并被批准用于某些高和中等环境噪声水平的应用（见6.1）。术语头戴式耳机可替换地用于头戴式麦克风，并在提及本规范中涵盖的任何物品时使用。

This specification covers the requirements for headset-microphones with rigid headband. These parts meet established requirements for communications equipment used to protect against hazardous noise exposure and are approved for use in certain high and moderate ambient noise level applications (see 6.1). The term headset is to be used interchangeably for headset-microphone and is used when referring to any of the articles covered in this specification.