scope:

Scope.

This specification covers headsets and headset-microphone assemblies intended for use in medium ambient noise level environments of 85-105 dBA SPL (Sound Pressure Level). These headset-microphone assemblies use dynamic earphones of the moving coil type that transform electrical energy into acoustical energy. A complete assembly includes headband, earphone(s) mounted in rigid earcups, with cord assemblies to meet requirements of various military service activities. The assemblies include, as required, a noise canceling microphone and boom.

intended Use:

The headsets and headset-microphones are ruggedized and unique to military and used on various military communication systems throughout aircraft, ship and ground weapon systems.