Both monaural and binaural hearing aid systems now are widely used by the hearing-impaired to increase their social adequacy by compensating for their loss in acuity. A recent review of previous experiments and clinical reports on binaural hearing9 has shown that there is no adequate a priori evidence to support a final conclusion about the efficiency of one hearing aid system over another. For example, the argument has persisted that because the person with a binaural hearing aid system regains use of both ears, a more reasonable approximation of normal hearing is obtained than with a monaural system. However, one can not easily demonstrate an equivalence between the ears among the hearing-impaired comparable to that among normal-hearing persons. Again, evidence that some persons with unilateral hearing losses do, in fact, localize1,6,8 does not support the contention that the salient advantage of binaural hearing aid use is localization. These arguments both
WRIGHT HN, CARHART R. The Efficiency of Binaural Listening Among the Hearing-Impaired. Arch Otolaryngol. 1960;72(6):789–797. doi:10.1001/archotol.1960.00740010803014
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