A Rehabilitative Approach to the Problem of Unilateral Hearing Impairment: The Contralateral Routing of Signals (CROS)

Abstract

Twenty adults with no assisted hearing in 1 and with normal or nearly normal hearing in the opposite ear were studied in connection with the use of a hearing aid, with the microphone pickup in the vicinity of the bad ear and with the sound routed electrically to the good ear. This type of hearing aid use is practical for a segment of the unilateral hearing-impaired population. The better the hearing in the good ear the less likely it is that a person will react positively. A follow-up study, conducted 8 months after the major investigation, revealed 7 of the original 20 subjects had voluntarily purchased similar hearing-aids in eyeglasses.