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July 1974

Versions of the CROS Hearing Aid

Author Affiliations

Evanston, Ill
From the Hearing Clinic, Northwestern University, Evanston, Ill.

Arch Otolaryngol. 1974;100(1):50-57. doi:10.1001/archotol.1974.00780040054011

In addition to the CLASSIC-CROS hearing aid, originally intended only for persons with unilateral hearing loss, there are now ten versions: MINI-CROS, HI-CROS, FOCAL-CROS, POWER-CROS, BICROS, OPEN-BICROS, UNI-CROS, MULTI-CROS, IROS, and FROS. As a consequence, a greater variety of hearing impairment can be accommodated with wearable amplification. Thus, today more hearing-impaired persons are able to use a hearing aid who otherwise might not, and still others are achieving greater satisfaction from wearable amplification. Most noticeable are persons with asymmetrical hearing loss and those with bilateral high-frequency hearing impairment. We suggest certain guidelines for selecting an appropriate form of amplification on the basis of audiometric configuration and the difference in hearing between the two ears.