Sue heard a low sound, several times repeated.

VOA: special.2009.08.01

But because the way sound waves operate, we have these low sound waves taking a very long time to clear.

但鉴于声波的传播方式,低声波要过更长的时间才消失

耶鲁公开课 - 聆听音乐课程节选

We had that very interesting piece last time, "Polish Oxcart" where he used this principle of low sounds produce sound waves that stay forever and we hear those low sounds first and last.

上次我们听了一段很有意思的曲子,《牛车》,当时他运用低频声音,持续时间长的原理,我们在最初和最后听到的都是低音

耶鲁公开课 - 聆听音乐课程节选

Now,there came to my ears a low,dull,quick sound, such as a watch makes when inside a piece of cotton.

VOA: special.2009.05.16

So, for example, we have this average level, and then it can go high where we have the peak, or it can go very low. We can also discuss sound waves, so again it's just the periodic variation of some property -- in this case we're talking about density, so we have high density areas and low density areas.

例如这是平均位置，在峰的位置水位高，在谷水位低，我们也可以,讨论声波它也是某种,量的周期变化，在这里我们,讨论的是密度,我们有高密度区和低密度区。

麻省理工公开课 - 化学原理课程节选

It was a low,dull,quick sound -- much a sound as a watch makes when enveloped in cotton.

VOA: special.2009.02.02

Because of the sort of particular character of the bassoon sound, it's often used to play sort of funny, little low-note characters in the orchestra.

由于巴松管的声音有这种特点,它总是用来表现幽默,在管弦乐队中演奏比较低沉部分

耶鲁公开课 - 聆听音乐课程节选

It was a low,dull, quick sound like a watch makes when inside a piece of cotton.

VOA: special.2009.05.16