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Research on Auditory Long Latency Response in Normal Hearing Subjects
H Liu1,2,3, J Zheng1,3, X P Yang3
1Institute of Forensic Medicine, Nanchang University, Nanchang 330019, China.
Fa Yi Xue Za Zhi
|November 25, 2017
Summary
Auditory long latency response (ALR) is a stable technology for predicting hearing thresholds. The relationship between sound intensity and ALR wave characteristics is crucial for accurate auditory assessment.
Area of Science:
- Audiology
- Neuroscience
- Biomedical Engineering
Background:
- Auditory long latency response (ALR) is a neurophysiological measure of auditory processing.
- Understanding the relationship between stimulus intensity and ALR characteristics is essential for clinical applications.
Purpose of the Study:
- To investigate the relationship between sound stimulus intensity and the latency and amplitude of auditory long latency responses (ALR).
- To evaluate the utility of ALR in predicting auditory thresholds.
Main Methods:
- Forty-six subjects with normal hearing were tested using ALR with five different sound stimulus intensities (70, 50, 30, 20, 10 dB nHL).
- Key indices including N₁ wave latency, P₂ wave latency, and N₁-P₂ amplitude were measured and statistically analyzed.
Main Results:
- A 100% rate of ALR wave detection was observed in normal-hearing subjects.
- As sound stimulus intensity decreased, N₁ and P₂ wave latencies progressively delayed, and the N₁-P₂ amplitude decreased.
Conclusions:
- Auditory long latency response (ALR) demonstrates stability and potential for hearing threshold prediction under appropriate conditions.
- The correlation between sound stimulus intensity and ALR parameters (N₁ latency, P₂ latency, N₁-P₂ amplitude) is significant for auditory threshold assessment.
