Hemanth N Shetty¹, Srikar Vijayasarathy², Jeevan Govindaraju¹*, Sanjitha Sridhar³ and Ananya Basappa¹

¹Department of Audiology, JSS Institute of Speech and Hearing, Mysuru, India
²Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India
³Aanchal Best Hearing Care Centre, Erode, Aanchal Best Hearing Care Centre, Erode, India

*Corresponding Author: Jeevan Govindaraju, Department of Audiology, JSS Institute of Speech and Hearing, Mysuru, India.

Received: December 04, 2023; Published: January 05, 2024

Abstract

Introduction: Optimising the recording of Auditory Brainstem responses is critical for the clinic because of its widespread utility. Objective determination of minimum number of sweeps using computationally less intensive methods required is a step in this direction.

Objective: To estimate the number of sweeps required to reach a good SNR for click and 500 Hz tone burst ABRs across intensities in normal hearing young adults, to check for inter-rater agreement and to check for the validity of this model in the clinical population.

Methods: ABRs were recorded in 30 young adults with normal hearing sensitivity using clicks and 500 Hz tone bursts at 90, 70 and 40 dB nHL. The variation of SNR with the number of sweeps was modeled with linear regression to estimate the optimal sweeps required for each stimulus condition. This model was checked for inter-rater reliability, and validated in 30 individuals with a diverse degree and type of hearing loss.

Results: In normal hearing young adults, SNR of 1 could be obtained with just 500 sweeps even at 40 dB nHL for clicks, but needed at least 2000 sweeps for 500 Hz tone burst. Recordings done based on this estimate required lesser time than the traditionally fixed sweep numbers. Further, peaks marked based on this criterion had a good inter-rater reliability, and was largely valid in different degrees of hearing loss.

Conclusions: The optimized sweep number could be used to guide relatively inexperienced clinicians on the minimum sweep number required for each stimulus condition.

Keywords: Auditory Brainstem Response; Objective Determination; Signal-to-Noise Ratio; BERA

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Citation

Citation: Jeevan Govindaraju., et al. “Optimising Click and 500 Hz Tone-burst ABR Averaging Using Signal to Noise Ratio Criterion in Adults with and without Hearing Loss".Acta Scientific Otolaryngology 6.2 (2024): 10-17.

Copyright

Copyright: © 2024 Jeevan Govindaraju., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.