Objective: Tinnitus is one of the reported complaints in individuals with Auditory Neuropathy Spectrum Disorder (ANSD). The study highlights the prevalence of tinnitus and its characteristics in individuals with ANSD. Study design: The study consisted of 95 patients with tinnitus out of 149 individuals with ANSD. The overall prevalence, laterality and gender effect was studied in these 95 patients. The study also reports on the subjective nature of tinnitus in 23 subjects and its relationship with the confi guration of the audiogram. Results: The prevalence of tinnitus was found to be around 67%, mostly bilateral (89.5%) and seen more often in females (70.52%). The subjective pitch was low-pitched in individuals with low frequency hearing loss and the perceived pitch was high with a fl at confi guration of loss. Conclusion: Our results show prevalence of tinnitus is more than 50% in individuals with ANSD and the tinnitus matched with the individual ' s frequency of maximal hearing loss.
Results of the present study demonstrate that companding improved speech perception in quiet and noise for ANSD listeners. The amount of improvement is higher at higher SNRs. In normal-hearing listeners, companding showed marginal improvement in both quiet and noise. The findings are discussed for rehabilitation of ANSD listeners by hearing aids which incorporate the companding strategy.
The results of the study show that there are gender differences in audiological findings and hearing aid benefits in individuals with ANSD. However, well-controlled prospective studies are essential to confirm the results obtained and to identify the possible mechanisms underlying the gender differences.
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