Dawson Caitlin, Aalto Daniel, Simko Juraj, Vainio Martti
Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland.
Communication Sciences and Disorders, Faculty of Rehabilitative Medicine, University of Alberta, Edmonton, Canada.
PeerJ. 2017 Sep 1;5:e3734. doi: 10.7717/peerj.3734. eCollection 2017.
The perceived duration of a sound is affected by its fundamental frequency and intensity: higher sounds are judged to be longer, as are sounds with greater intensity. Since increasing intensity lengthens the perceived duration of the auditory object, and increasing the fundamental frequency increases the sound's perceived loudness (up to ca. 3 kHz), frequency modulation of duration could be potentially explained by a confounding effect where the primary cause of the modulation would be variations in intensity. Here, a series of experiments are described that were designed to disentangle the contributions of fundamental frequency, intensity, and duration to perceived loudness and duration. In two forced-choice tasks, participants judged duration and intensity differences between two sounds varying simultaneously in intensity, fundamental frequency, fundamental frequency gliding range, and duration. The results suggest that fundamental frequency and intensity each have an impact on duration judgments, while frequency gliding range did not influence the present results. We also demonstrate that the modulation of perceived duration by sound fundamental frequency cannot be fully explained by the confounding relationship between frequency and intensity.
较高的声音被判定持续时间更长，强度较大的声音也是如此。由于强度增加会延长听觉对象的感知时长，而基频增加会提高声音的感知响度（高达约3千赫兹），因此时长的频率调制可能会因一种混淆效应而得到潜在解释，即调制的主要原因可能是强度变化。在此，我们描述了一系列实验，旨在厘清基频、强度和时长对感知响度和时长的影响。在两项强制选择任务中，参与者判断了两个在强度、基频、基频滑动范围和时长上同时变化的声音之间的时长和强度差异。结果表明，基频和强度各自对时长判断有影响，而频率滑动范围并未影响当前结果。我们还证明，声音基频对感知时长的调制不能完全由频率与强度之间的混淆关系来解释。
