This study involved playing and listening (using recorded sounds) experiments to investigate how changes in soundpost length (for a fixed soundpost position) affect the perceptual qualities of the violin and what the threshold of change is below which players and luthiers do not perceive differences. A length-adjustable carbon fiber soundpost was employed. During the playing experiment, subjects played a provided violin on which the soundpost length was modified by the experimenter to find their optimal soundpost lengths. Then the experimenter varied the soundpost length randomly in ten trials within ±0.11 mm around their optimal lengths and asked subjects to always compare with the previous setting. The results showed that subjects' optimal soundpost lengths varied from 0.132 to 0.616 mm relative to the original length (53 mm), but subjects could not recognize length variation of 0.11 mm or less at above chance levels. During the listening experiment, subjects listened to 16 pairs of recordings through a computer interface and were asked, for each pair, whether the violin setup was the same or different. The results showed that subjects could differentiate soundpost lengths with a difference of about 0.198 mm at better than chance level.

中文翻译：

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通过演奏和听力测试感知小提琴音柱紧密度

这项研究涉及演奏和聆听（使用录制的声音）实验，以研究音柱长度的变化（对于固定的音柱位置）如何影响小提琴的感知质量，以及低于演奏者和制琴师不会感觉到差异的变化阈值。采用了长度可调的碳纤维音柱。在演奏实验期间，受试者演奏了提供的小提琴，实验者在小提琴上修改了音柱长度，以找到他们的最佳音柱长度。然后，实验者在十次试验中随机改变音柱长度，其最佳长度在 ±0.11 毫米范围内，并要求受试者始终与之前的设置进行比较。结果表明，受试者的最佳音柱长度相对于原始长度（53 毫米）从 0.132 到 0.616 毫米不等，但受试者无法识别 0.11 毫米或更小的长度变化。在听力实验中，受试者通过计算机接口收听了 16 对录音，并被问及每对小提琴设置是否相同或不同。结果表明，受试者可以在优于偶然水平的情况下区分音柱长度，差异约为 0.198 毫米。