Effect of Audiometric Configuration on Binaural Temporal Fine Structure Sensitivity in Adults with Sensorineural Hearing Loss
Abstract
Background and Aim: Temporal Fine Structure (TFS) cues are crucial for pitch perception, sound localization, and speech understanding in noise. Hearing loss can impair TFS sensitivity, but the role of audiogram configuration remains unclear. Therefore, this study aimed to compare binaural TFS sensitivity in adults with Sensorineural Hearing Loss (SNHL) having different audiogram configurations.
Methods: This comparative cross-sectional study included 47 adults (32 with sloping audiograms, 15 with rising/flat audiograms) aged 18–50 with bilateral mild to moderate SNHL (26–55 dB HL). All participants had normal outer and middle ear status, were righthanded, and had no cognitive impairment. TFS sensitivity was measured using the TFSLow Frequency (TFS-LF) test at 250, 500, and 750 Hz, and the TFS-Adaptive Frequency (TFS-AF) test at Interaural Phase Differences (IPDs) of 45° and 135°.
Results: For the TFS-LF test, average thresholds were lower in the sloping group at all frequencies, but the difference between the two groups was not significant (p>0.05). For the TFS-AF test, thresholds at IPD 135° were significantly higher than at IPD 45° (p<0.001), but the difference between the two groups was not significant. Significant correlations were observed between the TFS-LF and the TFS-AF thresholds (r=–0.783, p<0.001).
Conclusion: There is no significant difference in TFS sensitivity between adults with sloping and rising/flat audiograms. Absolute hearing thresholds at various frequencies do not solely influence TFS sensitivity; factors such as cochlear health, neural timing, and individual variability may also affect the outcome.
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| Issue | Vol 35 No 2 (2026) | |
| Section | Research Article(s) | |
| Keywords | ||
| Temporal fine structure sensorineural hearing loss configuration interaural phase difference | ||
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