Telex Echelon 150 Active Noise Reduction Headset is a great place to start for hearing protection. The Telex Echelon 150 is a great headset investment for student pilots or those looking for a good value. As with all of our full cushion headsets, the Telex Echelon 150 features the Telex Patented ComfortCam allowing you to quickly and easily control the tension of the ear cups for clamp free flying. Up to 30 dBs of noise cancellation will provide hours of hearing protection, comfort and clear communications.