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Κυριακή 8 Αυγούστου 2021

Auditory processing in normally hearing individuals with and without tinnitus: assessment with four psychoacoustic tests

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Eur Arch Otorhinolaryngol. 2021 Aug 7. doi: 10.1007/s00405-021-07023-w. Online ahead of print.

ABSTRACT

PURPOSE: In most cases, tinnitus co-exists with hearing loss, suggesting that poorer speech understanding is simply due to a lack of acoustic information reaching the central nervous system (CNS). However, it also happens that patients with tinnitus who have normal hearing also report problems with speech understanding, and it is possible to suppose that tinnitus is to blame for difficulties in perceptual processing of auditory information. The purpose of the study was to evaluate the auditory processing abilities of normally hearing subjects with and without tinnitus.

METHODS: The study group comprised 97 adults, 54 of whom had normal hearing and chronic tinnitus (the study group) and 43 who had normal hearing and no tinnitus (the control group). The audiological assessment comprised pure-tone audiometry and high-frequency pur e-tone audiometry, impedance audiometry, and distortion product oto-acoustic emission assessment. To evaluate possible auditory processing deficits, the Frequency Pattern Test (FPT), Duration Pattern Test (DPT), Dichotic Listening Test (DLT), and Gap Detection Threshold (GDT) tests were performed.

RESULTS: The tinnitus subjects had significantly lower scores than the controls in the gap detection test (p < 0.01) and in the dichotic listening test (p < 0.001), but only for the right ear. The results for both groups were similar in the temporal ordering tests (FPT and DPT). Right-ear advantage (REA) was found for the controls, but not for the tinnitus subjects.

CONCLUSION: In normally hearing patients, the presence of tinnitus may be accompanied with auditory processing difficulties.

PMID:34363504 | DOI:10.1007/s00405-021-07023-w

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