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Tinnitus and High Frequency Hearing: a Study of 175 Cases
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In: ETSU Faculty Works (2013)
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| 2 |
Tinnitus and Normal Hearing: A Study of 175 Cases
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In: ETSU Faculty Works (2012)
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The Influence of High Frequency Hearing Loss on the Distortion Product Otoacoustic Emissions in Tinnitus Subjects with Normal Hearing Thresold (0,25-8kHz)
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In: ETSU Faculty Works (2012)
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| 4 |
The Relationship Between Distortion Product Otoacoustic Emissions and Extended High-Frequency Audiometry in Tinnitus Patients
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In: ETSU Faculty Works (2012)
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| 5 |
Distortion Product Otoacoustic Emissions in Normal-hearing Patients with Bilateral Tinnitus and in Non-tinnitus Controls
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In: ETSU Faculty Works (2011)
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| 6 |
Distortion-Product Otoacoustic Emissions in Normal-hearing Patients with Either Unilateral or Bilateral Tinnitus
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In: ETSU Faculty Works (2011)
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| 7 |
Extended High-frequency Audiometry and DPOAEs in Patients with Unilateral Tinnitus
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In: ETSU Faculty Works (2010)
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| 8 |
Distortion Product Otoacoustic Emissions in Normal-hearing Patients with Unilateral Tinnitus
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In: ETSU Faculty Works (2010)
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| 9 |
Influence of Unilateral Tinnitus on Distortion Product Otoacoustic Emission Levels
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In: ETSU Faculty Works (2009)
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Abstract:
It has been suggested that the presence of a limited area of damaged outer hair cells (OHCs) with intact inner hair cells, which may not be detected on the conventional audiogram, results in unbalanced neural activity between Type I and Type II fibers leading to tinnitus. In normal-hearing tinnitus patients, DPOAEs provided ambiguous data of OHC function when compared to non-tinnitus controls. Hearing loss in the extended high-frequency (EHF) region may decrease DPOAEs evoked at lower frequencies. Results of EHF audiometry in tinnitus patients are limited. The aim of the study was to evaluate DPOAEs and EHF thresholds in normal-hearing patients reporting unilateral tinnitus in left ear. Thus, each subject acted as their own control. Data were obtained for 26 subjects with bilateral hearing thresholds10, 12.5, 14, and 16 kHz. The DP-grams were measured in the 0.5-8 kHz range using 65/55-dB SPL primaries and f2/f1=1.2. The data analyses included DPOAEs with S/N>3 dB. Median audiometric data showed that thresholds in the left ears were significantly higher than those in the right ears at all four EHFs. Mean DPOAE levels of the left ears were lower than those of the right ears in the frequency range above 1 kHz. Additionally, a paired-comparison test of DPOAE levels of each patient’s right and left ear revealed significant differences at 6 and 8 kHz. The results indicate that: 1. OHC impairment in the most basal region reduces contribution to more apically generated DPOAEs; 2. OHC impairment in a limited area, which may be revealed by DPOAEs but not by conventional audiometry, can contribute to tinnitus generation; and 3. patients with unilateral tinnitus and normal hearing on the conventional audiogram are likely to demonstrate hearing loss in the EHF region.
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Keyword:
Audiology and Speech-Language Pathology; distortion product; DPOAE; otoacoustic emission; Speech Pathology and Audiology; unilateral tinnitus
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URL: https://dc.etsu.edu/etsu-works/2199
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| 10 |
Extended High-frequency Audiometry and Distortion Product Otoacoustic Emissions in Normal-hearing Patients with Unilateral Tinnitus
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In: ETSU Faculty Works (2009)
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| 11 |
Ultra-high Frequency (UHF) Hearing and DPOAE Levels at Lower Frequencies
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In: ETSU Faculty Works (2008)
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