QuietPoint Active Noise-Canceling Over-The-Ear Headphones Black. Audio-Technicaâ??s ATH-ANC9 QuietPoint headphones use proprietary active noise-cancelling 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-Technicaâ??s new Tri-Level Cancellation. Mode 1, ideal for use on airplanes, trains and buses, applies maximum noise cancellation to low frequencies. Mode 2, designed especially for use in noisy offices or crowded places, targets the mid-range frequencies, while Mode 3 creates a pristine, peaceful environment ideal for study.