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Psychoacoustic analyses of cochlear mechanisms in tinnitus patients with normal auditory thresholds.
Int J Audiol. 2014 Jan; 53(1):40-7.IJ

Abstract

OBJECTIVE

Tinnitus is often related to auditory dysfunction. We hypothesised that, among individuals with normal auditory thresholds, the mechanism of frequency selectivity might differ between subjects with and without tinnitus. Our objective was to identify any differences between normal-hearing individuals with tinnitus and those without in terms of psychophysical tuning curves (PTCs) and threshold-equalising noise (TEN) test results.

DESIGN

We determined PTCs and performed the TEN test.

STUDY SAMPLE

We evaluated 57 individuals, 16 with bilateral tinnitus (tinnitus-group) and 41 without tinnitus (control-group).

RESULTS

We found significant differences between tinnitus and control groups regarding the following: 2 kHz PTCs obtained in noise at 6 and 8 kHz; 4 kHz PTCs obtained in noise at 2 and 8 kHz; and 6 and 8 kHz PTCs obtained in noise at 2 and 3 kHz. The TEN test revealed differences between groups in terms of auditory thresholds, which were significantly higher in the tinnitus group. In addition, none of the individuals in the tinnitus group were found to have dead regions in the cochlea.

CONCLUSIONS

Despite having normal auditory thresholds, individuals with tinnitus have auditory patterns that differ significantly from those seen in individuals without tinnitus, such differences being suggestive of cochlear impairment.

Authors+Show Affiliations

School of Medicine - FMUSP, University of São Paulo , São Paulo , Brazil.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24168288

Citation

Buzo, Byanka Cagnacci, and Renata Mota Mamede Carvallo. "Psychoacoustic Analyses of Cochlear Mechanisms in Tinnitus Patients With Normal Auditory Thresholds." International Journal of Audiology, vol. 53, no. 1, 2014, pp. 40-7.
Buzo BC, Carvallo RM. Psychoacoustic analyses of cochlear mechanisms in tinnitus patients with normal auditory thresholds. Int J Audiol. 2014;53(1):40-7.
Buzo, B. C., & Carvallo, R. M. (2014). Psychoacoustic analyses of cochlear mechanisms in tinnitus patients with normal auditory thresholds. International Journal of Audiology, 53(1), 40-7. https://doi.org/10.3109/14992027.2013.840931
Buzo BC, Carvallo RM. Psychoacoustic Analyses of Cochlear Mechanisms in Tinnitus Patients With Normal Auditory Thresholds. Int J Audiol. 2014;53(1):40-7. PubMed PMID: 24168288.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Psychoacoustic analyses of cochlear mechanisms in tinnitus patients with normal auditory thresholds. AU - Buzo,Byanka Cagnacci, AU - Carvallo,Renata Mota Mamede, Y1 - 2013/10/29/ PY - 2013/10/31/entrez PY - 2013/10/31/pubmed PY - 2014/9/11/medline SP - 40 EP - 7 JF - International journal of audiology JO - Int J Audiol VL - 53 IS - 1 N2 - OBJECTIVE: Tinnitus is often related to auditory dysfunction. We hypothesised that, among individuals with normal auditory thresholds, the mechanism of frequency selectivity might differ between subjects with and without tinnitus. Our objective was to identify any differences between normal-hearing individuals with tinnitus and those without in terms of psychophysical tuning curves (PTCs) and threshold-equalising noise (TEN) test results. DESIGN: We determined PTCs and performed the TEN test. STUDY SAMPLE: We evaluated 57 individuals, 16 with bilateral tinnitus (tinnitus-group) and 41 without tinnitus (control-group). RESULTS: We found significant differences between tinnitus and control groups regarding the following: 2 kHz PTCs obtained in noise at 6 and 8 kHz; 4 kHz PTCs obtained in noise at 2 and 8 kHz; and 6 and 8 kHz PTCs obtained in noise at 2 and 3 kHz. The TEN test revealed differences between groups in terms of auditory thresholds, which were significantly higher in the tinnitus group. In addition, none of the individuals in the tinnitus group were found to have dead regions in the cochlea. CONCLUSIONS: Despite having normal auditory thresholds, individuals with tinnitus have auditory patterns that differ significantly from those seen in individuals without tinnitus, such differences being suggestive of cochlear impairment. SN - 1708-8186 UR - https://www.unboundmedicine.com/medline/citation/24168288/Psychoacoustic_analyses_of_cochlear_mechanisms_in_tinnitus_patients_with_normal_auditory_thresholds_ L2 - https://www.tandfonline.com/doi/full/10.3109/14992027.2013.840931 DB - PRIME DP - Unbound Medicine ER -