The sound made when a strong wind blows against a thin rod such as an electric wire. The sound made when a whip is swung quickly is based on the same principle, but a group of vortices called "Kármán vortices" that form downwind of the electric wire stimulate the vibration of the wire, creating the whistling sound. The faster the wind speed, the higher the vibration frequency and the higher the sound. It was studied by V. Strouhal of Germany in 1878. Aeolian sounds are named after Aeolus, the ancient Greek god of wind. [Masaji Ota] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
電線などの細い棒に強い風が当たるときに出る音。むちを速く振ったときに出る音も同じ原理によるが、電線の風下にできる「カルマンの渦」とよばれる渦巻群が電線の振動を促し、「ひゅうひゅう」という音をおこす。風速が大きいほど振動数も大きく、音は高い。1878年にドイツのストロールV. Strouhalが研究した。エオルス音aeolian soundsは古代ギリシアの風神アイオロスAeolusにちなんで命名された。 [大田正次] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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