[Comparative study between auditory steady-state responses, auditory brain-stem responses and liminar tonal...

Area of Science:

• Audiology and Hearing Science
• Neuroscience
• Medical Diagnostics

Background:

• Auditory steady-state responses (ASSR) represent an emerging auditive exploration technique.
• Modulation frequencies between 70-110 Hz are utilized in ASSR.
• Established auditive exploration methods include auditory brain-stem responses (ABR) and liminar tonal audiometry (LTA).

Purpose of the Study:

• To evaluate the diagnostic contribution of ASSR to hearing assessment.
• To compare the efficacy of ASSR and ABR in determining auditory thresholds.
• To analyze the correlation between ASSR-derived thresholds and LTA thresholds.

Main Methods:

• Investigated the contributions of ASSR and ABR to auditory threshold diagnostics.
• Compared ASSR and ABR thresholds against liminar tonal audiometry (LTA) thresholds.
• Examined correlations between thresholds obtained via ASSR and LTA.

Main Results:

• ASSR detected residual hearing that transient ABR did not.
• Significant differences were observed between ASSR-derived and LTA-derived thresholds for 500 and 1000 Hz carriers.
• Statistically significant correlations (P=.01) were found between ASSR and LTA thresholds for 500 and 1000 Hz carriers.

Conclusions:

• ASSR, utilizing modulation frequencies of 70-110 Hz, is a novel and objective auditive exploration technique.
• ASSR provides greater frequency specificity compared to click-based ABR stimuli.
• ASSR thresholds allow for reliable estimation of the true audition threshold, irrespective of consciousness state.