Department of Audiology and Speech-Language Pathology, Kulliyyah of Allied Health Sciences, International Islamic University Malaysia, Kuantan, Pahang.
Am J Audiol. 2020 Dec 9;29(4):838-850. doi: 10.1044/2020_AJA-20-00049. Epub 2020 Sep 23.
Purpose The purpose of this study is to investigate the influence of stimulus repetition rates on the auditory brainstem response (ABR) to Level-Specific (LS) CE-Chirp and click stimuli at multiple intensity levels in normal-hearing adults. Method A repeated-measure study design was used on 13 normal-hearing adults. ABRs were acquired from the study participants using LS CE-Chirp and click stimuli at four stimulus repetition rates (19.1, 33.3, 61.1, and 81.1 Hz) and four intensity levels (80, 60, 40, and 20 dB nHL). The ABR test was stopped at 40-nV residual noise level. Results High-stimulus repetition rates caused the ABR latencies to be longer and have reduced amplitudes in both ABR to LS CE-Chirp and click stimuli. The ABR to LS CE-Chirp Wave I, III, and V amplitudes were larger than ABR to click in almost all the stimulus repetition rates. However, there were no differences in the number of averages required to reach the stopping criterion between ABR to LS CE-Chirp and click stimulus, and between high-stimulus repetition rates and low-stimulus repetition rates. Conclusion The LS CE-Chirp at standard low-stimulus repetition rates can be used to elicit ABR for both neurodiagnostic and threshold seeking procedure.
本研究旨在探讨刺激重复率对正常听力成年人在多个强度水平下的 LS CE-Chirp 和 click 刺激的听觉脑干反应（ABR）的影响。
采用重复测量设计，对 13 名正常听力成年人进行研究。使用 LS CE-Chirp 和 click 刺激，在四个刺激重复率（19.1、33.3、61.1 和 81.1 Hz）和四个强度水平（80、60、40 和 20 dB nHL）下获取研究参与者的 ABR。ABR 测试在 40-nV 残余噪声水平下停止。
高刺激重复率导致 ABR 潜伏期延长，ABR 对 LS CE-Chirp 和 click 刺激的幅度降低。在几乎所有刺激重复率下，LS CE-Chirp 的 ABR 波 I、III 和 V 的幅度均大于 click 的 ABR。然而，LS CE-Chirp 和 click 刺激之间，以及高刺激重复率和低刺激重复率之间，达到停止标准所需的平均次数没有差异。
LS CE-Chirp 在标准低刺激重复率下可用于引出 ABR，适用于神经诊断和阈值寻求程序。
