ORL; journal for oto-rhino-laryngology and its related specialties · 2026
Evaluating Speech-in-Noise Deficits in Conductive Hearing Loss: The Underestimated Role of Low-Frequency Air-Bone Gaps.
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Seyrek Mustafa, Kabiş Burak, Özbilen Suat, Gündüz Bülent
Аннотация
UNLABELLED: <p>Introduction: This study aimed to investigate the impact of conductive hearing loss (CHL) on speech perception in noisy environments, with a particular focus on the role of low-frequency air-bone gaps. While CHL is traditionally considered a peripheral auditory disorder, emerging evidence suggests that it may also affect central auditory processing, especially under complex acoustic conditions.
METHODS: Thirty individuals diagnosed with CHL and thirty age-matched participants with normal hearing were recruited from the Audiology Unit of Gazi University. All participants underwent comprehensive audiological evaluations, including the Turkish Hearing in Noise Test (T-HINT). Speech recognition thresholds (SRTs) were measured adaptively in four listening conditions: quiet and noise presented from the front, right, and left. Speech-spectrum noise was delivered at 65 dB SPL.
RESULTS: Participants with CHL demonstrated significantly elevated SRTs across all noise conditions compared to the control group, indicating reduced speech-in-noise intelligibility. However, speech discrimination scores in quiet did not differ significantly between groups. Notably, larger air-bone gaps at low frequencies were strongly correlated with poorer SRTs, suggesting a frequency-specific vulnerability in noisy environments.
CONCLUSION: CHL substantially impairs speech perception in noise, primarily due to the detrimental effects of low-frequency air-bone gaps. These findings underscore the crucial role of low-frequency auditory input in the temporal and spectral processing of speech, underscoring the need for frequency-specific diagnostic and rehabilitative strategies in clinical audiology. </p>.
METHODS: Thirty individuals diagnosed with CHL and thirty age-matched participants with normal hearing were recruited from the Audiology Unit of Gazi University. All participants underwent comprehensive audiological evaluations, including the Turkish Hearing in Noise Test (T-HINT). Speech recognition thresholds (SRTs) were measured adaptively in four listening conditions: quiet and noise presented from the front, right, and left. Speech-spectrum noise was delivered at 65 dB SPL.
RESULTS: Participants with CHL demonstrated significantly elevated SRTs across all noise conditions compared to the control group, indicating reduced speech-in-noise intelligibility. However, speech discrimination scores in quiet did not differ significantly between groups. Notably, larger air-bone gaps at low frequencies were strongly correlated with poorer SRTs, suggesting a frequency-specific vulnerability in noisy environments.
CONCLUSION: CHL substantially impairs speech perception in noise, primarily due to the detrimental effects of low-frequency air-bone gaps. These findings underscore the crucial role of low-frequency auditory input in the temporal and spectral processing of speech, underscoring the need for frequency-specific diagnostic and rehabilitative strategies in clinical audiology. </p>.