[Correlation between the contralateral supressor effect and the auditory fatigue using transitory acoustic...

Area of Science:

• Audiology and Auditory Neuroscience
• Otoacoustic Emissions
• Hearing Loss Research

Context:

• Noise-induced hearing loss (NIHL) is a significant public health concern.
• Early identification of susceptible individuals is crucial for prevention.
• Transient otoacoustic emissions (TEOAEs) offer a non-invasive method to assess cochlear function.

Purpose:

• To identify individuals susceptible to developing noise-induced hearing loss.
• To evaluate the utility of transient otoacoustic emissions (TEOAEs) in detecting functional alterations within the auditory system.
• To correlate TEOAE changes with contralateral suppression and auditory fatigue.

Summary:

• Sixty-seven normal-hearing subjects underwent TEOAE recordings under three conditions: normal (SIN), simultaneous contralateral acoustic stimulation (EAC), and post-ipsilateral acoustic stimulation (EAI).
• A reduction in TEOAE amplitude was observed during EAC (0.954 dB SPL) and EAI (0.75 dB SPL) conditions.
• An inverse correlation was found between the magnitude of auditory fatigue and the contralateral suppressor effect.

Impact:

• The findings support the use of TEOAEs under various acoustic stimulation conditions for identifying individuals at risk of NIHL.
• This research provides a basis for targeted hearing conservation strategies.
• Understanding the interplay between contralateral suppression and auditory fatigue can lead to improved predictive models for hearing loss.