Salut GMC, justement l'aviation avait rejeté le projet du T45 d'après ceci:
"The T-45 lip microphone was a noise-canceling microphone designed by Electro-Voice, and allowed the user's voice to dominate over vehicle and battle noise. It was mounted snugly over the wearer's upper lip, and was held in place by soft vinyl straps that wrapped around the wearer's ears. The T-45 lip microphone connected to a SW-141 push-to-talk switch in the same manner as the T-30 throat microphone (see below). When first submitted to the Army Air Corps for consideration, the T-45 was flatly rejected. However, the design was successfully pitched to the Tank Corps, and the demonstration attracted the attention of the Marines Corps, which was interested in a noise-canceling microphone for use in amphibious landing craft. Electro-Voice won the coveted Army/Navy "E" Award for its T-45 contribution to the war effort. The T-45 continued in communications and aviation service for decades, and even saw use in NASA's Mercury, Gemini, and Skylab programs."