The horn obviously is a brass instrument and what makes the sound is a vibrating column of air.

显而易见的,圆号是个铜管乐器,它通过震动空气柱来发出声音

耶鲁公开课 - 聆听音乐课程节选

Now I didn't use--no hands-- that was just the notes that are naturally on the twelve and a half-foot length of vibrating air.

我没有用手控制,都是十二个半英尺高的震动空气柱,自然产生的音符

耶鲁公开课 - 聆听音乐课程节选

Point of absolute rest in a vibrating string we call a node.

一条绳子上绝对震动静止的点,我们称之为节点。

麻省理工公开课 - 固态化学导论课程节选

The string is vibrating higher when it's exactly twice what the lower one is.

高音弦的震动频率,正好是低音弦的两倍

耶鲁公开课 - 聆听音乐课程节选

That's the harmonic series that's on that, and what the valves do is they shorten and lengthen that vibrating column of air very much like the cello string on the fingerboard.

这就是圆号上的泛音列,活瓣的作用是增长或减短,空气柱的高度,很像大提琴指板上的弦

耶鲁公开课 - 聆听音乐课程节选

You're vibrating. You're acting as a wave.

就是通过振动，你把自己看做一列波。

麻省理工公开课 - 固态化学导论课程节选