Hearing Aid Specialist Practice Exam

The term 'CROS' stands for Contralateral Routing of Signals, which describes a specific type of hearing aid system designed for individuals with hearing loss in one ear. In a CROS system, a microphone on the affected ear picks up sounds and sends the signals wirelessly to a receiver in the better-hearing ear. This configuration allows the person to hear sounds coming from the direction of their poorer ear, enhancing their overall ability to perceive environmental sounds and speech, thus improving their spatial awareness.

CROS devices are particularly beneficial for those who have profound hearing loss in one ear but have normal or near-normal hearing in the other. This technology enables users to achieve a more balanced auditory experience without requiring amplification in the poorer ear, which may not benefit from amplification due to the severity of the loss.

Understanding this terminology and its application in hearing aids is crucial for hearing specialists, as it helps in making informed decisions about fitting and recommending the appropriate devices for patients with unilateral hearing loss.