她的學生丹尼爾.凡.貝爾倫(Daniel Van Beveren)在孔雀冠羽上裝設了機械振盪器,並且觀察冠羽的擺動。當機器的振盪頻率為二十六赫茲時──也就是一秒振盪二十六次──冠羽擺動得特別劇烈。這是會令孔雀冠羽產生共鳴的頻率,也正好是雄孔雀求偶時擺動尾羽的頻率,因此康恩對我說:「這不可能只是巧合。」
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