EVALUATING RESIDUAL BACKGROUND-NOISE IN HUMAN AUDITORY BRAIN-STEM RESPONSES
EVALUATING RESIDUAL BACKGROUND-NOISE IN HUMAN AUDITORY BRAIN-STEM RESPONSES
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DOI：
10.1121/1.411281
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发表时间：
1994-11-01
影响因子：
2.4
通讯作者：
ELBERLING, C
中科院分区：
文献类型：
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作者：
DON, M;ELBERLING, C
ABR平均值中的残余背景噪声的性质在正常听力对象中进行了经验性检查。使用Elberling和Don [Scand. Audiol. 13，187-197（1984）]。低水平点击刺激以2 dB步长呈现，范围从30到48 dB p-p. e。SPL。对于每个刺激水平，采集并存储10000次扫描以供分析。使用伪影拒绝和标准平均值的缺点被证明。它进一步证明了如何应用贝叶斯估计技术的Elberling和Wahlgreen [Scand. Audiol. 14，89-96（1985）]来形成加权平均值可以帮助最小化这些缺点。最后，较小的扫描块大小的贝叶斯技术的能力，以控制非平稳噪声的破坏性影响的影响进行了分析。最大限度地减少破坏性影响增加了用于客观检测或控制ABR记录质量的统计技术的价值。总之，这些技术的结合不仅提高了测试解释的准确性，而且提高了临床测试时间的效率，这对于控制医疗成本变得越来越重要。
The nature of the residual background noise in ABR averages was empirically examined in normal hearing objects. The residual noise in the average was estimated with use of the technique described by Elberling and Don [Scand. Audiol. 13, 187-197 (1984)]. Low-level click stimuli were presented in 2-dB steps spanning the range from 30 to 48 dB p-p.e. SPL. For each stimulus level, 10 000 sweeps were acquired and stored for analysis. Shortcomings of the use of artifact rejection and standard averaging are demonstrated. It is further demonstrated how application of the Bayesian estimation technique of Elberling and Wahlgreen [Scand. Audiol. 14, 89-96 (1985)] to form weighted averages can help minimize these shortcomings. Finally, the effects of smaller sweep block sizes on the Bayesian technique's ability to control the destructive effects of nonstationary noise are analyzed. Minimizing the destructive effects increases the value of statistical techniques used to detect objectively or to control the quality of ABR recordings. In all, these techniques in combination improve not only the accuracy of test interpretation but also the efficiency of clinical test time, which is becoming important for the control of medical costs.