The purpose of this investigation was to examine the effects of three commonly observed choral singer performance conditions (no movement, slight swaying, full-body swaying) on acoustic and perceptual measures of choral sound. We audio recorded an established university choir (N = 29 singers) performing a memorized piece while viewing the same conductor video and participating in one of the three performance conditions. We analyzed data through long-term average spectrum (LTAS), overall pitch deviation, and singer and listener (singer-listeners, expert-listeners) perceptions. LTAS results showed significant differences (p < .001) in spectral energy between all three conditions. The full-body swaying condition averaged a noticeable difference of 2.50 dB across the spectrum when compared to the other two conditions. Pitch analysis indicated the least overall pitch deviation during the slight swaying condition (−27.67 cents) and the most pitch deviation during the no-movement condition (−58.31 cents). Results indicated singer and singer-listener preferences for the full-body swaying condition and expert-listener preferences for the slight swaying condition. We discuss results in terms of future research and practical application for choral music educators.

中文翻译：

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三种常见合唱表演运动条件对合唱声音声学和感知测量的影响

这项调查的目的是检查三种常见的合唱歌手表演条件（无运动、轻微摇摆、全身摇摆）对合唱声音的声学和感知测量的影响。我们录制了一个已建立的大学合唱团（N = 29 位歌手）在观看相同的指挥视频并参与三种表演条件之一的同时演奏记忆的作品。我们通过长期平均频谱 (LTAS)、整体音高偏差以及歌手和听众（歌手-听众、专家-听众）的看法来分析数据。LTAS 结果显示所有三种条件之间的光谱能量存在显着差异 (p < .001)。与其他两种情况相比，全身摇摆情况在整个频谱上平均有 2.50 dB 的显着差异。音高分析表明，在轻微摇摆条件下（-27.67 美分）的总体音高偏差最小，在无移动条件下（-58.31 美分）的总音高偏差最大。结果表明歌手和歌手-听众对全身摇摆条件的偏好和专家-听众对轻微摇摆条件的偏好。我们讨论合唱音乐教育者未来研究和实际应用的结果。