The Audio-Technica ATH-ANC700BT wireless headphones with Bluetooth® technology employ a newly-developed active noise cancellation system that operates in a wider frequency range in the low through midrange frequencies than typical ANC designs, and provides a greater degree of noise cancellation. The Audio-Technica ATH-ANC700BT also provides improved isolation for better cancellation outside the active range. This enables the headphones to have much more effective noise-cancelling performance by responding to and cancelling a wider range of outside noise. In addition, the headphones’ microphones are mounted behind the driver diaphragm. In standard ANC headphones, the mics are mounted in a location where they can unintentionally pick up some of the generated noise-cancelling signal, which is then reprocessed in a feedback loop and can limit noise reduction performance. The Audio-Technica ATH-ANC700BT eliminates this issue by placing the ANC mics behind the driver diaphragm, which provides better noise cancellation along with improved audio quality.