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Article
April 1977

Application of Binaural Beat Phenomenon With Aphasic Patients

Author Affiliations

From Audiologic Consultant Associates, Inc, Oviedo, Fla (Dr Barr) and the Department of Communication, Florida Technological University, Orlando (Dr Mullin and Ms Herbert).

Arch Otolaryngol. 1977;103(4):192-194. doi:10.1001/archotol.1977.00780210048003
Abstract

• We investigated whether six aphasics and six normal subjects could binaurally fuse two slightly differing frequencies of constant amplitude. The aphasics were subdivided into two groups: (1) two men who had had mild cerebrovascular accidents (CVAs) during the past 15 months; (2) four men who had had severe CVAs during the last 15 months. Two tones of different frequency levels but equal in intensity were presented dichotically to the subjects at 40 dB sensation level. All subjects had normal hearing at 500 Hz (0 to 25 dB).

All six normal subjects and the two aphasics who had had mild CVAs could hear the binaural beats. The four aphasics who had had severe CVAs could not hear them. A 2 × 2 design resulting from this study was compared using χ2 test with Yates correction and was found to be significantly different (P <.05). Two theories are presented to explain these findings: the "depression theory" and the "temporal time-sequencing theory." Therapeutic implications are also discussed relative to cerebral and/or brain stem involvement in the fusion of binaural stimuli.

(Arch Otolaryngol 103:192-194, 1977)

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