Listen to your favorite tunes without interruption with Sony's MDR-NC300D ($320). This digital earpiece reduces ambient noise by up to 99% with three different noise-canceling modes: Mode A - general and movie mode; Mode B - airplane mode; and Mode C - trains/buses/cars mode. The MDR-NC300D features 16mm drivers, 6Hz to 24,000Hz frequency range and 16ohm impendence.