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谢泼德音调（），以罗格·谢泼德命名，是一种由八度音阶分隔的正弦波叠加而成的声音。当音调的低音音高向上或向下移动时，它被称为谢泼德音阶（）。这会产生一种音调的错听，该音调似乎在音高上不断升高或降低，但最终不会变得更高或更低。
这种错觉背后的理论在 BBC 的节目《》的一集中得到了展示，该效果被描述为“音乐三色柱”。
参见
- 干涉 (物理学)
- 音效
参考资料
外部链接
- [http://www.bbc.co.uk/programmes/p00gfdg1 BBC science show, Bang Goes the Theory, explains the Shepard Tone]
- [http://www.exploratorium.edu/exhibits/highest_note/ex.about.fr.html Demonstration of discrete Shepard tone (requires Macromedia Shockwave)]
- [http://www.netalive.org/tinkering/shepard-effect/ Visualization of the Shepard Effect using Java]
- [https://www.youtube.com/watch?v=PCs1lckF5vI A demonstration of a rising Shepard Scale as a ball bounces endlessly up a Penrose staircase] ([https://www.youtube.com/watch?v=boJD_gTLavA and down] )
- [http://codepen.io/yukulele/pen/PPgxbG Shepard tone Keyboard] on CodePen
*[https://www.cs.ubc.ca/labs/imager/contributions/flinn/Illusions/TT/tt.html Tritone paradox example (requires Java)]
[https://sites.google.com/site/pp2007pt/music Pedro Patricio's compositions formed around the auditory illusion of the perpetual melody (Perpetual Melody - contrasting moments*, 1-7)]
*[https://www.youtube.com/watch?v=P8RgeUa7_WI An E5 Shinkansen Bullet Train Departing Tokyo Station plays the sound of a Shepard Tone possibly due to how many cars and systems have to activate]
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