الفهرس 
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Abstract
Soliman (1987) reported on 11 patients with mild hearing loss, mostly low frequency in configuration, with poor speech discrimination out of proportion to the hearing loss together with highly distorted ABRs. This audiological profile was termed ”Low Frequency Sensori-Neural Hearing Loss Syndrome”. The author recommended further research in order to identify the exact site of lesion and the specific etiological factor(s) causing this low frequency hearing disorder..
Recently, there has been an increasing body of literature demonstrating similar audiological profile for which the name ”Auditory Neuropathy” was coined (Starr et al., 1996). There is now a well established criteria for auditory neuropathy which are hearing loss for pure tones, impaired word discrimination out of proportion to pure tone loss, absent or abnormal Auditory Brainstem Response (ABR) and normal outer hair cell function as measured by Otoacoustic Emissions (OAEs) and Cochlear Microphonics (CM).
The exact site(s) of lesion and nature of pathology in AN patients is no yet known. The site of the disorder is likely to be in the eighth nerve or at the synapse between the hair cells and the eight nerve.