| Exploring the Amplitudes of Binaural Interaction Components Elicited by Diverse Stimuli and Their Relationships With Behavioral Measures in Individuals With Normal Hearing |
Won So1 
, Sungmin Lee2
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1Department of Communication Science and Disorders, Grand Valley State University, Allendale, MI, USA
2Department of Speech-Language Pathology and Aural Rehabilitation, Tongmyong University, Busan, Korea |
Correspondence
Sungmin Lee ,Tel: +82-51-629-2134, Fax: +82-51-629-2019, Email: smlee8345@gmail.com
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Submitted: October 14, 2024 Accepted after revision: November 21, 2024 |
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| Abstract |
Background and Objectives
This study was performed to comprehensively examine the amplitudes of the binaural interaction components (BICs) elicited by chirps, clicks, and 500 Hz tone-burst stimuli in individuals with normal hearing. Electrophysiological evidence of BICs was obtained and assessed for correlations with interaural time difference (ITD) and interaural level difference (ILD).
Subjects and Methods
Sixteen adults (4 males and 12 females) with normal hearing participated in this study. Auditory brainstem responses (ABRs) to chirp, click, and 500 Hz tone-burst stimuli were recorded, and BICs were derived based on wave V. The behavioral thresholds of ITDs and ILDs across multiple frequencies were obtained and analyzed.
Results
BICs were found in most participants, regardless of stimulus type. The amplitudes of BICs elicited by chirps were the highest, followed by those elicited by clicks and 500 Hz tone-bursts. A significant correlation was found between the amplitudes of chirp-evoked BICs and the thresholds of 500 Hz ITDs and ILDs.
Conclusions
This study found that chirp stimuli may be effective in eliciting BIC and predicting behavioral binaural interaction processing at low frequencies. |
| Keywords:
Binaural hearing; Binaural interaction component; Auditory brainstem response; Interaural time difference; Interaural level difference |
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