A2 features two audio modes that let you decide what you want to hear - and what you don't want to hear. These two modes are called Active Noise Cancellation (ANC) and Normal (Off) mode.
The Active Noise Cancellation (ANC) mode in A2 reduces outside noise which allows you to fully immerse yourself in your own world.
How to switch between the modes
The earbuds are in Normal (Off) mode by default, where background noise is neither reduced nor amplified. By holding the touch control for 2 seconds on either earbud the modes cycle between Normal and Active Noise Cancellation.
How does Active Noise Cancellation (ANC) work?
The mechanics behind Active Noise Cancellation is in its name. A2 uses Hybrid ANC technology, which is a combination of Feed Forward and Feedback ANC technology. Two microphones are located on the outside and inside of each earbud to effectively capture all kinds of noise, even the noise you hear through your ears while wearing the earbuds. The speakers then emit the recorded noise in real-time - but inverted - which cancels the noise nearly entirely.