3M™ PELTOR™ ComTac™ VI has new omni-directional microphones, high fidelity speakers, and a new digital signal processor that helps improve the overall sound quality of the headset. The environmental listening feature, also known as “talk-through” is a means of allowing safe audio sounds to bypass the individual hearing protection electronically while still helping protect against harmful noises. This is accomplished with 3M’s proprietary digital audio circuit integrated into the headset. A microphone receives the sounds outside of the headset and transmits them to a speaker inside of the headset. The level-dependent digital audio circuit senses noise levels above the desired threshold and compresses them to a safe decibel level or amplifies weak sounds to an audible level.