Heavy Duty Throat Microphone. Dual microphone elements pick up sound directly from users throat, so very little ambient noise is heard.

SPM-1600 Bone conductive headphones

NBP-BH Series - Bone Conduction Headset: Dual-Bone Conduction temple speakers, wrap-around headset and directional, noise reducing Boom Mic.

Skull Microphone/Headset for CONSTRUCTION Hard Hats: Lightweight in-helmet communications system that mounts to the helmet liner without tools.

The SPM -1800 is equipped with dual bone conduction sensors with a microphone on one side and a speaker on the other

The TE01 bone-conduction communication headset uses a high-sensitivity vibration sensor to collect the vibration of the vocal cords transmitted to the ear canal

The SPM-H1000 air-breathing mask bone-conducting headset uses a high-sensitivity vibration sensor to transmit voice through skull vibration