Noise isolation (15-35 dB) surpasses that of active noise-canceling earphones / For CD, DVD, MP3 and MiniDisc players, NotebooksETYMOTIC RESEARCH ER-6 Noise Isolating Earphones - ER-6 Isolator Earphones reduce outside Sound levels by 34-36 DB (two to three times that of active noise-canceling earphones). Their high isolation allows you to hear the full range of today's Digital recordings without having to play them at unnaturally high and unsafe levels. Since you don't have to boost the volume to overcome external noise, ear overload Distortion is minimized.
