Audio-Technica’s ATH-ANC9 QuietPoint headphones use proprietary active noise-canceling technology to provide a comfortable listening environment in areas with high ambient noise. Delivering noise cancellation up to a remarkable 95%, the ATH-ANC9 QuietPoint headphones feature Audio-Technica’s Tri-Level Cancellation. Mode 1, ideal for use on airplanes, trains and buses, applies maximum noise cancellation to low frequencies.