Sometimes you just want the world to quiet down. Whether you're on a bus or a plane, at work with a droning vent, or even at home sitting down for a good game, there are times when you want to press MUTE on all that ambient noise. Today, we're looking at the Audio-Technica ATH-ANC900BT QuietPoint Bluetooth Headphones. They're Hi-Res certified, offer 35 hours of battery life, and feature active noise cancelling. Are they worth $299?