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

You're running, you're shaking a beaker up here at room temperature.

你跑步，震动烧杯，这都是在恒定温度和压强的情况下的过程。

麻省理工公开课 - 热力学与动力学课程节选

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

At the beginning of the rainy season, Baal opens a slit, or makes a slit in the clouds, and thunders and shakes the Earth.

在雨季开始的时候，Baal在云端开一条缝，雷鸣震动大地。

耶鲁公开课 - 旧约导论课程节选

The modes of vibration in that string are quantized.

在那条弦上的震动模式是量子化的。

麻省理工公开课 - 固态化学导论课程节选

Here is the pitch in--of--a string an octave higher so you can see it this way. As you probably know, if you take a long string and pluck it, it's going to take that long string a long time to pass that sort of cycle, if you will, just one pass through that cycle.

这也是个音高,一个高八度的音弦,你可以这样这样看 你们可能知道,如果你拨动长弦,长弦要经过很长时间,才能完成一个震动周期,如果你想,可以尝试下

耶鲁公开课 - 聆听音乐课程节选

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

All right. So you probably read in the book that the bassoon is a double reed instrument, and so just to show you what that looks like-- You've probably seen it but if you haven't, two pieces of wood vibrate together when I blow through them.

好的,你们可能在书上看到过,巴松管是个双簧乐器,我将为你们演示双簧怎样演奏,你们可能见过,如果没有请看我演示,我吹奏时,两个木片会一起震动

耶鲁公开课 - 聆听音乐课程节选