Throat Mic Picks Up Sounds Directly From Your Vocal Cords

Simply put, the Throat Mic "hugs your neck and picks up sound directly from your vocal cords; you can whisper and still be heard clearly on the other end and the person you're speaking to hears no outside sound." Continue reading to see how the special forces version works.
Therefore a throat mic based headset is perfect to use in any noisy environment... like while laying down mortar rounds,

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- Source : http://www.techeblog.com