Department of Medical Physics and Acoustics, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany.
Starkey Hearing, Eden Prairie, MN, USA.
Sci Rep. 2021 Nov 2;11(1):21456. doi: 10.1038/s41598-021-00707-7.
Perception adapts to the properties of prior stimulation, as illustrated by phenomena such as visual color constancy or speech context effects. In the auditory domain, only little is known about adaptive processes when it comes to the attribute of auditory brightness. Here, we report an experiment that tests whether listeners adapt to spectral colorations imposed on naturalistic music and speech excerpts. Our results indicate consistent contrastive adaptation of auditory brightness judgments on a trial-by-trial basis. The pattern of results suggests that these effects tend to grow with an increase in the duration of the adaptor context but level off after around 8 trials of 2 s duration. A simple model of the response criterion yields a correlation of r = .97 with the measured data and corroborates the notion that brightness perception adapts on timescales that fall in the range of auditory short-term memory. Effects turn out to be similar for spectral filtering based on linear spectral filter slopes and filtering based on a measured transfer function from a commercially available hearing device. Overall, our findings demonstrate the adaptivity of auditory brightness perception under realistic acoustical conditions.
感知会适应先前刺激的属性，这可以通过视觉颜色恒常性或语音语境效应等现象来证明。在听觉领域，当涉及到听觉亮度这一属性时，人们对适应过程知之甚少。在这里，我们报告了一项实验，该实验测试了听众是否会适应自然音乐和演讲摘录中施加的光谱颜色。我们的结果表明，在逐个试验的基础上，听觉亮度判断存在一致的对比适应。结果表明，这些效果随着适应器上下文持续时间的增加而增加，但在持续时间约为 8 个 2 秒的试验后趋于平稳。响应标准的简单模型产生了与测量数据的 r =.97 相关，证实了亮度感知在听觉短期记忆范围内的时间尺度上进行适应的观点。基于线性频谱滤波器斜率的频谱滤波和基于市售听力设备的测量传递函数的滤波的效果相似。总的来说，我们的发现证明了在现实声学条件下听觉亮度感知的适应性。
