A Masking Dilemma in Bilateral Conduction Deafness

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Abstract
There are theoretical grounds for believing that, in testing the hearing of some subjects with bilateral conduction deafness, it is impossible adequately to mask the hearing of the opposite ear without at the same time masking the hearing of the test ear. Discussion of this problem will be facilitated by a preliminary definition of a number of familiar audiological terms. Definitions Test Ear.—The ear whose performance is under investigation in a monaural hearing test. Opposite Ear.—The ear whose performance is not under investigation in a monaural hearing test. Auditory Stimulus.—Any sound, simple or complex, fed to a listener's ear during a hearing test. Test Stimulus.—The auditory stimulus to whose presence or arrival a listener's response is being examined during a hearing test. Overheard Stimulus.—Any auditory stimulus fed into one ear will also stimulate the other ear; the stimulus may, for the sake of clarity of

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