The patented ME-16R Hot Mic® evolved from many years of research and development to design a true noise canceling microphone that can withstand the harsh marine environment.  Many off-the-shelf elements have been used in diving helmets and full face masks (ffm), but require some sort of protection.  The protection usually compromises the quality defeating its use.  The Hot Mic has proven itself time and time again on many movie sets and Search & Rescue operations.  The sound quality produced using a Hot Mic is second to none.