Temporal weights in the level discrimination of time-varying sounds

被引：0

作者：

Pedersen, Benjamin ^{[1
,2
]}

Ellermeier, Wolfgang ^{[1
,3
]}

机构：

[1] Sound Quality Research Unit (SQRU), Department of Acoustics, Aalborg University, Fredrik Bajers Vej 7-B5, 9220 Aalborg Øst, Denmark

[2] Atlantic Technologies, Jónas Broncks gøta 35, FO-110 Torshavn, Faroe Islands

[3] Technische Universität Darmstadt, Germany

来源：

Journal of the Acoustical Society of America | 2008年 / 123卷 / 02期

关键词：

To determine how listeners weight different portions of the signal when integrating level information; they were presented with 1-s noise samples the levels of which randomly changed every 100 ms by repeatedly; and independently; drawing from a normal distribution. A given stimulus could be derived from one of two such distributions; a decibel apart; and listeners had to classify each sound as belonging to the soft or loud group. Subsequently; logistic regression analyses were used to determine to what extent each of the ten temporal segments contributed to the overall judgment. In Experiment 1; a nonoptimal weighting strategy was found that emphasized the beginning; and; to a lesser extent; the ending of the sounds. When listeners received trial-by-trial feedback; however; they approached equal weighting of all stimulus components. In Experiment 2; a spectral change was introduced in the middle of the stimulus sequence; changing from low-pass to high-pass noise; and vice versa. The temporal location of the stimulus change was strongly weighted; much as a new onset. These findings are not accounted for by current models of loudness or intensity discrimination; but are consistent with the idea that temporal weighting in loudness judgments is driven by salient events. © 2008 Acoustical Society of America;

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学科分类号：

摘要：

Journal article (JA)

引用

页码：963 / 972

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