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December 1956

The Use of Tympanic Injections as an Experimental Control in Masking Research

Author Affiliations

New York; Colorado Springs, Colo.
Supervisor, Speech and Hearing Clinic, Columbia-Presbyterian Medical Center (Mr. Miller). Director of Otorhinolaryngology, Colorado Springs Medical Center (Dr. Forman).

AMA Arch Otolaryngol. 1956;64(6):526-536. doi:10.1001/archotol.1956.03830180076011

I. Background of the Procedure  In the original design of an experiment in masking prepared for a doctoral thesis, a number of possible masking techniques were to have been applied clinically to a group of hard of hearing patients having a differential in the hearing acuity of their two ears of 30 db. or more. A Zwislocki audiometer with the use of a two-oscillator system to mask the test tone, a continuous ear douche introduced into the nontested ear, and a specially constructed audio testing assembly utilizing wooden masking enclosures were among the procedures to have been utilized in an attempt to evolve a more satisfactory clinical masking instrument than is presently available. The use of such an approach to the problem necessitated some sort of a control. We had to know which of the techniques being employed was giving us information on the subject's actual hearing in the poorer