EXPERIENCE over the past ten years leads us to believe that lesions at the various levels of the auditory system are characterized by different patterns of response to a battery of auditory tests. In the evaluation of patients with known hearing disorders, such as acoustic trauma or verified acoustic neuroma, otologists and audiologists are able to review the results of a test battery, thus establishing certain relationships between the lesion sites and corresponding auditory responses.
On the other hand, in evaluating results of a battery of tests before deciding whether a particular hearing disorder is cochlear, retrocochlear, or central in nature, it is not always possible to assign patients to diagnostic categories with certainty. Frequently, even with recent developments in audiology, there are cases which can only be categorized as having sensorineural hearing loss, as the site of lesion is difficult to establish.
During the past five years we have