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The Doppler effect explains changes in the length of light waves or sound waves as they move toward you or away from you.
VOA: special.2009.04.29
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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
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And bathing inside the inner ear fluids where they become stimulated by sound waves and acceleration forces.
毛细胞悬浮在内耳液中,接受声波和其它外力的刺激。
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But extra wax can harden and form a blockage that interferes with sound waves and reduces hearing.
VOA: special.2010.03.31
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The lowest sounds create the largest sound waves and they last the longest.
最低的声音发出了最长声波,而且声波持续最久
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Then the snow's surface will help to send back sound waves.
VOA: special.2010.01.05
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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。
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Snow also is known to influence the movement of sound waves.
VOA: special.2010.01.05
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We're used to thinking about sound being tranduced; being converted by acoustic waves into electrical signals that can be recognized by your iPods.
我们想想声音信号的转换过程,声音由声波转化为电子信号,你的iPod能够识别这种信号
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The wind came again. Finally,the men heard a new sound C the sound of waves breaking and crashing on the shore.
VOA: special.2010.03.06
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Yes, to some extent it is that, yes, but what I was thinking about here is this idea that the lowest sounds create the longest sound waves, and they last the longest.
是的,从某种程度上来说是那样,但我在想的是这个理论,最低的声音,发出最长的声波,而且持续的最久
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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
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They're short sound waves.
而那些短的声波
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