Abstract
ContextHearing loss is the most important risk factor of tinnitus, but this relation is not straightforward; some patients with severe tinnitus have normal hearing, whereas many patients with hearing loss do not have tinnitus.AimsThe aim was to determine if high frequency audiometry (HFA) may reveal significant differences between normal hearing participants with and without tinnitus.Settings and designThis is a case–control study.Participants and methodsHFA was done on two groups of participants with normal hearing sensitivity. The first group was composed of 20 adults with tinnitus, whereas the control group was 15 age-matched and sex-matched participants, not suffering from tinnitus.Statistical analysisData were analyzed using SPSS software package version 20.0. Significance of the results was judged at the 5% level. χ2 with Fisher’s exact as a correction, Kruskal–Wallis, Mann–Whitney, and Pearson’s coefficient tests were used.ResultsHFA showed no significant difference between the two studied groups.ConclusionTinnitus in normal hearing participants does not necessarily indicate corresponding damage in the cochlea
Highlights
Tinnitus is the detection of sound without an external source [1]
We studied the role of high frequency audiometry (HFA) in the assessment of normal hearing tinnitus patients on conventional audiometry and whether it provides more relevant information about cochlear damage not proved by the conventional audiometry
Thresholds were assessed using the American National Standards Institute (ANSI) approach, which is an ascending technique beginning with an inaudible signal; the level was increased in 5 dB steps till a response occurred
Summary
Most of tinnitus patients display impaired hearing threshold in the pure-tone audiometry (PTA), especially in the high frequency range [2,3,4]. The human ear has an auditory range that can reach up to 20 000 Hz. Frequencies between 9000 and 20 000 Hz are named extended high frequencies (EHFs) in the international literature [8]. The involvement of EHFs in auditory pathology is diverse. They affect detecting the location of the sound [9] and understanding language, especially in noisy surroundings [10]. They are associated with agerelated hearing loss, ototoxicity, and acoustic trauma
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