Influence of stimulus polarity on the auditory brainstem response from level-specific chirp

Dzulkarnain, Ahmad Aidil Arafat and Salamat, Sabrina and Shahrudin, Fatin Amira and Jamal, Fatin Nabilah and Zakaria, Mohd Normani (2021) Influence of stimulus polarity on the auditory brainstem response from level-specific chirp. Journal of Audiology and Otology, 25 (4). pp. 199-208. ISSN 23841621 E-ISSN 2384-17

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Abstract

Background and Objectives: No known studies have investigated the influence of stimulus polarity on the Auditory Brainstem Response (ABR) elicited from level-specific (LS) chirp. This study is important as it provides a better understanding of the stimulus polarity selection for ABR elicited from LS chirp stimulus. We explored the influence of stimulus polarity on the ABR from LS chirp compared to the ABR from click at 80 dBnHL in normal-hearing adults. Subjects and Methods: Nineteen adults with normal hearing participated. The ABRs were acquired using click and LS chirp stimuli using three stimulus polarities (rarefaction, condensation, and alternating) at 80 dBnHL. The ABRs were tested only on the right ear at a stimulus rate of 33.33 Hz. The ABR test was stopped when the recording reached the re- sidual noise level of 0.04 μV. The ABRs amplitudes, absolute latencies, inter-peak latencies (IPLs), and the recorded number of averages were statistically compared among ABRs at different stimulus polarities and stimuli combinations. Results: Rarefaction polarity had the largest ABR amplitudes and SNRs compared with other stimulus polarities in both stimuli. There were marginal differences in the absolute latencies and IPLs among stimulus polarities. No significant difference in the number of averages required to reach the stopping criteria was found. Conclusions: Stimulus polarities have a significant influence on the ABR to LS chirp. Rarefaction polarity is recommended for clinical use because of its larger ABR peak I, III, and V amplitudes than those of the other stimulus polarities

Item Type:	Article (Journal)
Additional Information:	4465/91789
Uncontrolled Keywords:	Level-specific chirp; Stimulus polarity; Auditory brainstem response; Auditory evoked potentials; Auditory pathway
Subjects:	R Medicine > RF Otorhinolaryngology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Allied Health Sciences > Department of Audiology and Speech-Language Pathology Kulliyyah of Allied Health Sciences
Depositing User:	Prof Dr Ahmad Aidil Arafat Dzulkarnain
Date Deposited:	28 Aug 2021 18:13
Last Modified:	12 Apr 2022 08:25
URI:	http://irep.iium.edu.my/id/eprint/91789

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