ANR™ Active Noise Rejection™ technology is the smart stuff embedded within every Blackbox™ product. Using the signal received from microphones within Blackbox™ headphones and earphones ANR™ constantly monitors and analyses sound entering the ear canal and compares this sound signal to that which is coming from the original audio source.

Reading the differences in each of the two streams of sound waves, ANR™ generates ‘anti-waves’ of sound, to suppress and largely cancel-out the unwanted, external noise entering the ear canal. An observable comparison would be for example, when ocean waves roll against a seawall or dockside and then bounce back out, subduing the continuing series of incoming waves.