So I’m trying to get my head around the principle of a material’s natural frequency with the example of breaking glass with sound and have few questions :
1- How do particles vibrate when crossed by a sound wave? 2- And is sound wave the only thing that gives these particles such vibration and hence natural frequency is inherent to the propagation of sound in the material? 3- For example, this glass has a natural frequency of 575Hz, what does it exactly mean?
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>How do particles vibrate when crossed by a sound wave
The sound wave **is** vibrating particles. They vibrate because they kick into each other to pass over the energy.
>And is sound wave the only thing that gives these particles such vibration and hence natural frequency is inherent to the propagation of sound in the material?
I’m not entirely sure what you mean by that. You can hit things with a hammer to make them vibrate. That vibration IS sound too though. All *ordered* vibration is sound, unordered vibration is temperature.
>For example, this glass has a natural frequency of 575Hz, what does it exactly mean?
It means the shape of the glass permits a soundwave of 575 oscillations per second to stay stable in it. That means, the wave is exactly reflected at both ends. Other frequencies will be weakened/dampened, this frequency will be amplified by the glass.
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