International Licensing Examination (ILE) Practice Test

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What does CROS stand for in hearing aid terminology?

Contralateral Routing of Sound/Signal
Bilateral Contralateral Routing of Sound
Central Routing of Sound/Suppression
Combined Routing of Sound/Signal

The correct answer is: Contralateral Routing of Sound/Signal

CROS stands for Contralateral Routing of Sound/Signal, which is a term used in hearing aid technology to describe a specific setup for individuals with unilateral hearing loss, or single-sided deafness. In this configuration, a microphone placed on the side with poorer hearing captures sounds and transmits them to a hearing aid on the better-hearing side. This allows the individual to better perceive sounds coming from the direction of the impaired ear, thereby improving their overall auditory experience and spatial awareness. The other options, while related to the concept of routing sound, do not accurately represent the widely accepted definition of CROS. For instance, the term "Bilateral Contralateral Routing of Sound" suggests a dual setup that is not typical for CROS, which is exclusively for one-sided hearing loss. "Central Routing of Sound/Suppression" and "Combined Routing of Sound/Signal" are not recognized terms in this context, making them incorrect in defining CROS. Hence, the definition of CROS as Contralateral Routing of Sound/Signal is both precise and correct.