風弦琴流行於18世紀歐洲,在木製共鳴箱上安裝幾條琴弦,風吹琴弦,自動發出樂聲。
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Aeolian_harp_in_the_old_castle_of_Baden_Baden_-_Project_Gutenberg_eText_14097.png/640px-Aeolian_harp_in_the_old_castle_of_Baden_Baden_-_Project_Gutenberg_eText_14097.png)
英國物理學家約翰·威廉斯特拉斯·瑞利勳爵在1915年發表一篇論文,用卡門渦街的交替旋渦解釋風弦琴發聲的原理。風吹琴弦,產生卡門渦街,卡門渦街頻率和琴弦的固有頻率發生共振而發聲[1]。中國古代在風箏上安裝竹片,風吹發聲如箏[2],也是卡門渦街造成的。
參考文獻
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