A practical method of predicting the loudness of complex electrical stimuli
A practical method of predicting the loudness of complex electrical stimuli
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DOI：
10.1121/1.1558378
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发表时间：
2003-04-01
影响因子：
2.4
通讯作者：
McDermott, HJ
中科院分区：
文献类型：
--
作者：
McKay, CM;Henshall, KR;McDermott, HJ
多电极人工耳蜗语音处理器的输出由具有复杂时间和空间模式的电流波形组成。大多数现有的处理器输出顺序的双相电流脉冲。本文介绍了一种实用的方法来计算响度估计这样的刺激，除了从不同的耳蜗区域的相对响度贡献。该方法既可用于控制现有处理策略中的响度或水平，也可用于控制新的声音处理策略中的强度线索。该方法基于McKay等人[J. Acoust.美国社会110，1514-1524（2001）]，其中添加了简化近似，即落在几毫秒持续时间的时间积分窗口内的电流脉冲独立地贡献于刺激的总体响度。用六个人进行了三次实验。第一个实验验证了简化的假设，并允许计算响度增长函数用于响度预测方法。以下实验证实了使用具有各种电极位置和电流水平模式的多电极刺激的方法的准确性。(C)2003年，美国声学学会。
The output of speech processors for multiple-electrode cochlear implants consists of current waveforms with complex temporal and spatial patterns. The majority of existing processors output sequential biphasic current pulses. This paper describes a practical method of calculating loudness estimates for such stimuli, in addition to the relative loudness contributions from different cochlear regions. The method can be used either to manipulate the loudness or levels in existing processing strategies, or to control intensity cues in novel sound processing strategies. The method is based on a loudness model described by McKay et al. [J. Acoust. Soc. Am. 110, 1514-1524 (2001)] with the addition of the simplifying approximation that current pulses falling within a temporal integration window of several milliseconds' duration contribute independently to the overall loudness of the stimulus. Three experiments were carried out with six. implantees who use the CI24M device manufactured by Cochlear Ltd. The first experiment validated the simplifying assumption, and allowed loudness growth functions to be calculated for use in the loudness prediction method. The following experiments confirmed the accuracy of the method using multiple-electrode stimuli with various patterns of electrode locations and current levels. (C) 2003 Acoustical Society of America.