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<p>The Acceptable Noise Level (ANL) measures an individual’s noise tolerance during speech listening, while the Speech-in-Noise Test (SPIN) assesses speech perception in the presence of noise. The role of the medial olivocochlear (MOC) system as assessed using contralateral suppression of Oto Acoustic Emissions (OAEs) in speech in noise perception is acknowledged. However, there is a need to explore the correlation between ANL, OAE suppression, and SPIN to understand the physiological basis of these measures. The research involved a group of 60 young adults, aged between 18 and 25 years, who were native Kannada speakers with normal hearing abilities. The Acceptable Noise Level was determined in all the participants. Speech perception of noise was assessed using Quick Speech in Noise (QSIN). To quantify contralateral suppression, the difference in Transient Evoked Otoacoustic Emissions (TEOAE) amplitude in quiet was compared to the TEOAE amplitude in the presence of noise on the contralateral side. Data analysis revealed no statistically significant correlations between ANL and SPIN, ANL, and contralateral suppression of OAEs in both ears. At the same time, there were weak correlations observed in some frequencies between speech perception in noise and contralateral suppression of OAEs. Thus, the current study findings highlight that ANL, SPIN, or contralateral suppression of OAEs alone may not provide a comprehensive assessment of speech perception in noise. However, the weak correlations between SPIN and contralateral suppression of OAEs at some frequencies offer insights into the role of the efferent auditory system in signal detection in noise.</p>

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Relation Between Acceptable Noise Levels, Speech Perception in Noise & Contralateral Suppression of Otoacoustic Emissions in Kannada Speaking Young Adults with Normal Hearing Sensitivity

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Vipin Ghosh,
  • Aditya Singhal

摘要

The Acceptable Noise Level (ANL) measures an individual’s noise tolerance during speech listening, while the Speech-in-Noise Test (SPIN) assesses speech perception in the presence of noise. The role of the medial olivocochlear (MOC) system as assessed using contralateral suppression of Oto Acoustic Emissions (OAEs) in speech in noise perception is acknowledged. However, there is a need to explore the correlation between ANL, OAE suppression, and SPIN to understand the physiological basis of these measures. The research involved a group of 60 young adults, aged between 18 and 25 years, who were native Kannada speakers with normal hearing abilities. The Acceptable Noise Level was determined in all the participants. Speech perception of noise was assessed using Quick Speech in Noise (QSIN). To quantify contralateral suppression, the difference in Transient Evoked Otoacoustic Emissions (TEOAE) amplitude in quiet was compared to the TEOAE amplitude in the presence of noise on the contralateral side. Data analysis revealed no statistically significant correlations between ANL and SPIN, ANL, and contralateral suppression of OAEs in both ears. At the same time, there were weak correlations observed in some frequencies between speech perception in noise and contralateral suppression of OAEs. Thus, the current study findings highlight that ANL, SPIN, or contralateral suppression of OAEs alone may not provide a comprehensive assessment of speech perception in noise. However, the weak correlations between SPIN and contralateral suppression of OAEs at some frequencies offer insights into the role of the efferent auditory system in signal detection in noise.