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Answered 2008-03-19 05:19:46

Sound is mechanical energy. The energy displayed by the source is transferred into the medium through which it travels. When the wave, that moving energy, comes into contact with a surface, some of the energy is transferred into the surface. But how much? The more solid and "less moving" the surface (seen on a tiny scale), the less the moving air waves, those compression and rarifaction waves, can transfer energy into the surface. And that's what it's all about. The "softer" the surface, the more those pressure waves in air can affect that surface and transfer their energy into it.

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What happens when sound hits soft materials?

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