Can Sound Waves Break Glasses? All About Sound Waves

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SUMMARY

Sound waves can indeed break glass when the frequency of the sound matches the natural frequency of the glass, causing it to oscillate and eventually shatter. This phenomenon is particularly effective with crystal wine glasses, which are more susceptible to resonance. Achieving this effect typically requires a focused speaker to amplify the singer's voice, as it is extremely difficult for a human voice alone to generate sufficient energy. The thickness and shape of the glass also play a crucial role in its ability to withstand sound waves.

PREREQUISITES
  • Understanding of sound wave frequency and resonance
  • Knowledge of material properties, specifically glass types
  • Familiarity with audio amplification techniques
  • Basic principles of acoustics and sound behavior
NEXT STEPS
  • Research the physics of resonance and its applications in materials
  • Explore audio amplification methods for enhancing vocal sound
  • Study the properties of different types of glass, particularly crystal
  • Investigate real-world examples of sound-induced material failure
USEFUL FOR

Acoustic engineers, physicists, singers, and anyone interested in the intersection of sound and material science.

franz32
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Is it true that people can sing better inside a bathroom? How could that be?

Other links in internet tells about that Walls of Jericho (Old TEstamament).
Joshua and his men surrounded the city, blew their trumpets and shouted very loudly... then the wall crumbled... I always thought of that x-men siryn who can destroy things by shouting loudly... is that physically possible, especially that of the wall?

Can sopranos or very high-pitched people break wine glasses by singing an appropriate note? I saw it in some Filipino movies... is that true? I don't know if that's fictionor whatever...
 
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Theoretically it is possible.

When the frequency of the sound wave matches natural frequency of the object, the object will then starts to oscillate with a larger amplitude hence more energy, the object would eventually reach a critical state where the atoms would no longer be able to hold together and break apart.
 
franz32 said:
Can sopranos or very high-pitched people break wine glasses by singing an appropriate note? I saw it in some Filipino movies... is that true? I don't know if that's fictionor whatever...

It depends on the wine glass but it is generally extremely difficult to do. The only way I’ve seen it done was with a focused speaker being placed close to the wine glass and the singers voice recorded and amplified and played over the speaker.
 
Its true. But you need a crystal wine glass. I don't know about shape. And the thicker the better(I think). The person would thick on the glasss, listen to the note and sing the same note(I think). And then it will break.
 

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