[多次听觉稳态反应平均的停止标准]
[Stopping criteria for averaging the multiple auditory steady-state response].
作者信息
Torres Fortuny Alejandro, Pérez Abalo María C, Sotero Díaz Roberto C, Rioja Rodríguez Lilliam, Rodríguez Dávila Ernesto, Galán García Lidice, Eimil Suarez Eduardo
机构信息
Departamento de Audición y Lenguaje, Centro de Neurociencias de Cuba, La Habana, Cuba.
出版信息
Acta Otorrinolaringol Esp. 2011 May-Jun;62(3):173-80. doi: 10.1016/j.otorri.2010.10.008. Epub 2011 Jan 3.
INTRODUCTION AND OBJECTIVES
The aim of this study was to examine the efficiency of the averaging technique for estimating multiple auditory steady state responses in normal hearing subjects and to provide quantifiable stopping criteria at near-threshold intensities.
METHODS
Multiple amplitude-modulated (89-115 Hz) tones (500, 1,000, 2,000 and 4,000 Hz) were simultaneously presented to both ears at a fixed intensity of 40 dB HL. A total of 128 data epochs were averaged (23.9 minutes).
RESULTS
The results showed that "classic" ensemble averaging, although accurate and time-efficient in most cases, could not extract all near-threshold MSSR from noise, even after recording a considerable number of sweeps. The present study also proposed a different approach to evaluate the background noise based on evaluating the mean of the variance close to the signal.
CONCLUSIONS
The study proposed quantitative parameters to establish stopping criteria during auditory steady-state recordings.
引言与目的
本研究旨在检验平均技术在估计正常听力受试者的多个听觉稳态反应方面的效率，并在接近阈值强度时提供可量化的停止标准。
方法
以40 dB HL的固定强度同时向双耳呈现多个调幅（89 - 115 Hz）音调（500、1000、2000和4000 Hz）。总共对128个数据段进行平均（23.9分钟）。
结果
结果表明，“经典”总体平均法虽然在大多数情况下准确且高效，但即使记录了相当数量的扫描，也无法从噪声中提取所有接近阈值的多频稳态反应。本研究还提出了一种基于评估信号附近方差均值来评估背景噪声的不同方法。
结论
该研究提出了在听觉稳态记录期间建立停止标准的定量参数。
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