本规范涵盖了动圈消噪动圈话筒的一般要求。本文所述产品用于氧气面罩、防毒面具和头戴式话筒（吊杆式和防护罩式）。这些部件在规定的地面和海拔高度的中等至高噪声环境中提供通信，并符合美国空军既定的灵敏度标准（见6.1）。

This specification covers the general requirements for moving coil, noise-canceling dynamic microphones. The products described herein are used in oxygen and gas-masks, and headset-microphones (boom-mounted and protective-shield mounted). These parts provide communications within moderate to high noise environments, at ground level and altitude, as specified, and meet established United States Air Force sensitivity standards (see 6.1).