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在语音感知中的不同频率区域的光谱对比效应的独立性)
Christian E Stilp1, Matthew B Winn2
1Department of Speech Pathology and Audiology, Marquette University, Milwaukee, Wisconsin 53233, USA.
光谱对比效应 (SCEs) 偏差语音声音感知. 这项研究发现,SCE在不同的听觉频率区域中独立运行,这意味着它们的影响在低频,中频和高频之间没有相关性.
科学领域:
- 听觉感知是一种听觉感知.
- 精神声学是一种精神声学.
- 语音处理 语音处理
背景情况:
- 众所周知,光谱对比效应 (SCE) 通过感知放大光谱差异来影响语音识别.
- 这些效应偏向分类远离先前的声学背景,在特定频率区域内观察到一致的大小.
- 之前的研究表明,在不同频率区域中,SCE大小的潜在一致性.
研究的目的:
- 为了调查光谱对比效应 (SCEs) 在不同听觉频率区域中是否表现出一致的大小.
- 为了确定SCEs的影响在语音感知中的低,中,高频范围是否独立或相关.
主要方法:
- 听力正常的听众使用在三个频率区域中操纵的刺激执行了音频分类任务:低频F1,中频F3和高频摩擦.
- 在每一个目标词之前,有一个先驱句子,过以强调低频或高频能量.
- 对于每个频率区域和参与者样本,评估了SCE的大小.
主要成果:
- 观察到,正如预测的那样,光谱对比效应会影响所有测试频率区域的语音分类.
- 最重要的是,这些SCE的幅度在不同频率区域之间没有发现相关性.
- 这种缺乏相关性既在单独的参与者群体内,也在单独的参与者群体之间都是如此.
结论:
- 光谱对比效应对语音感知的影响在不同的听觉频率区域之间是独立的.
- 这一发现澄清了更广泛的感知背景,表明光谱对比在整个听觉频谱中没有统一的影响.
- 频谱对比的听觉处理在低频,中频和高频范围内明显地运行.
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