The effect of silent gaps on temporal weights in loudness judgments
The effect of silent gaps on temporal weights in loudness judgments
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DOI：
10.1016/j.heares.2020.108028
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发表时间：
2020-09-01
期刊：
影响因子：
2.8
通讯作者：
Oberfeld, Daniel
中科院分区：
文献类型：
--
作者：
Fischenich, Alexander;Hots, Jan;Oberfeld, Daniel
人类对时变声音的响度判断显示出在声音开始时具有增加的权重的非均匀时间加权模式。进行了四个实验，以调查是否会再次出现这种首因效应后，沉默的间隙，插入到一个适当的持续时间的水平波动的声音。在三个实验中，连续的声音，以及声音包含不同持续时间的沉默的差距。在包含间隙的声音和没有间隙的声音之间比较时间响度权重。数据表明，随着间隙持续时间的增加，在第二声音部分上再次出现越来越明显的首因效应，在这个意义上，a）与没有间隙的条件相比，分配给差距之后的第一段的权重增加，并且B）随后的权重再次显示出随时间的推移而降低。对于350 ms及以上的间隙持续时间，该效应具有统计学显著性。为了研究电平的衰减是否可以导致与无声间隙相同的结果，在第四个实验中，声音的中间部分中的段被衰减，并且将所得的权重与中间段未被衰减或呈现700 ms无声间隙而不是中间段的条件进行比较。15 dB的衰减导致首因效应的显著重现，尽管30 dB的衰减和无声间隙的效果更明显。结果进行了讨论，在光的听觉神经反应，掩蔽效应的强度分辨率，并假设证据整合过程的基础上。(C)2020爱思唯尔B.V.保留所有权利。
Human loudness judgments of time-varying sounds show a non-uniform temporal weighting pattern with increased weights at the beginning of a sound. Four experiments were conducted to investigate whether this primacy effect reoccurs after a silent gap of an appropriate duration that is inserted into a level-fluctuating sound. In three of the experiments, contiguous sounds as well as sounds containing silent gaps of different durations were presented. The temporal loudness weights were compared between the sounds that contained a gap and the sounds without a gap. The data showed that with increasing gap duration an increasingly pronounced primacy effect reoccurred on the second sound part in the sense that a) the weights assigned to the first segments after the gap were increased compared to the conditions without a gap, and that b) the following weights again showed a decrease over time. This effect was statistically significant for gap durations of 350 ms and above. To investigate whether an attenuation in level can lead to the same results as a silent gap, segments in the middle part of a sound were attenuated in the fourth experiment, and the resulting weights were compared to conditions in which the middle segments were unattenuated or where a 700 ms silent gap was presented instead of the middle segments. An attenuation of 15 dB resulted in a significant reoccurrence of the primacy effect, although the effect was more pronounced for an attenuation of 30 dB and the silent gap. The results are discussed in the light of auditory nerve responses, masking effects on intensity resolution, and assumptions based on evidence integration processes. (C) 2020 Elsevier B.V. All rights reserved.