Classical CROS/BiCROS indication is a single sided deafness. Persons affected face real challenges in a variety of everyday situations. There are decreased awareness and audibility of sound from the unaidable side and the result can be an inability to determine the direction of sounds. A CROS/BiCROS system can be a great relief to these persons.

The transmitter of CROS-Systems, respectively BiCROS System for patients with an hearing loss additional on the "better ear, pick up the sound arriving at the "poorer ear" and send it to the receiver of the opposite side. That allows the user to receive sounds from both sides.