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Rauna K. Surr, MS; Gerald I. Schuchman, MS

Arch Otolaryngol. 1976;102(3):160-161.

Abstract
• Obtaining a hermetic seal in the external auditory canal is often a major obstacle in impedance audiometry. In the present study, the acoustic reflex threshold was determined for three groups of subjects, first with and then without a pressure-tight seal. It was found that for subjects with normal hearing or sensorineural hearing loss and normal tympanograms, 96% of the measurements obtained without a pressure seal were within 5 dB of those obtained with a seal. Among the subjects who exhibited negative middle ear pressure, the acoustic reflex could be measured consistently at the point of maximum compliance, while no response was observed without a pressure seal.

(Arch Otolaryngol 102:160-161, 1976)

Author Affiliations
From the Army Audiology and Speech Center, Walter Reed Army Medical Center, Washington, DC.

Footnotes
Accepted for publication, Nov 11, 1975.

Reprint requests to the Army Audiology and Speech Center, Walter Reed Army Medical Center, Washington, DC 20012 (Ms Surr).

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