Brief-Tone Audiometry in Patients with VIIIth Nerve Tumor

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Abstract
Brief-tone audiometry, the determination of temporal auditory integration of power, has been proposed as a diagnostic procedure on the assumption that the results identify the ear with cochlear pathology. Previous studies have shown a clear distinction between the normal ear and the ear with cochlear impairment but have not included results for the ear with sensory-neural loss from Vlllth nerve lesion. In this study, temporal integration functions were obtained for 10 normal hearers, 10 patients with cochlear pathology and 3 patients with surgically confirmed Vlllth nerve tumors. The cochlear loss patients were clearly distinguished from the normals by abnormality in integration function. Results for the Vlllth nerve tumor patients fell well within the range of normal on the brief-tone test.

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