INVESTIGATION OF THE EFFECTS OF NARROWBAND AND WIDEBAND NOISE ON CENTRAL INHIBITION IN PURE TONE AUDIOMETRY IN INDIVIDUALS WITH HEARING LOSS
1Beykoz Üniversitesi Meslek Yüksekokulu, Odyometri, Istanbul, Türkiye2İstanbul Topkapı Üniversitesi Plato Meslek Yüksekokulu, Odyometri Programı, İstanbul, Türkiye
3İstanbul Medipol Üniversitesi Sağlık Bilimleri Fakültesi Odyoloji Anabilim Dalı, Odyoloji Bölümü, İstanbul, Türkiye Objective: This is a study which compares the effects of narrowband noise versus wideband noise on central inhibition values in individuals with hearing loss.
Material and Methods: Thirty-seven subjects were primarily examined for otoscopic examination, pure tone audiometry, speech audiometry, and tympanometric evaluations; then demonstrated localization of hearing loss, type and degree of hearing loss. Similarly, pure tone thresholds were tested in three different conditions while applying narrowband and wideband noise as well as without any masking noise using contralateral route.
Results: In cases with sensorineural hearing loss, at frequencies of 250, 500, 2000 and 8000 Hz; In cases with conductive hearing loss, the use of wideband noise at frequencies of 250,500 and 1000 Hz reduced the threshold shift, causing a statistically significant change in the thresholds (p<0.05).
Conclusion: In our study, it was found that the use of wideband noise in conductive and sensorineural hearing losses decreased threshold shift and caused more reliable threshold determination.
Keywords : Audiometry; Pure-Tone; hearing; noise