What Determines Sound Properties in a Water-Filled Bottle Xylophone?

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SUMMARY

The discussion focuses on determining sound properties in a water-filled bottle xylophone, specifically how to find the wavelength and frequency of the sound produced. Participants emphasize the importance of modeling the bottle with perfect reflections at the boundaries, similar to a vibrating string. By applying wave equations and imposing null conditions at the ends, one can derive the wavelengths of the modes, identify nodes and antinodes, and calculate the corresponding frequencies using the dispersion relation.

PREREQUISITES
  • Understanding of wave equations and boundary conditions
  • Knowledge of standing waves and their properties
  • Familiarity with the dispersion relation in wave mechanics
  • Basic principles of sound and acoustics
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  • Study the mathematical modeling of standing waves in various mediums
  • Learn about the dispersion relation and its applications in acoustics
  • Explore the concept of nodes and antinodes in wave phenomena
  • Investigate the effects of different bottle shapes and water levels on sound properties
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Students studying physics, acoustics enthusiasts, and educators looking to enhance their understanding of sound properties in musical instruments.

LP23
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1. How do you find the wavelength in a glass bottle water xylophone?

2. How do you find the frequency?

3. Where are the antinodes and nodes located?

4. Where is the standing wave located?
 
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You should provide more details on the problem (for example how the bottle is modeled, if the walls are perfectly reflecting and so on)... and you should show also at least the reasoning you did and where you got stuck... we are here to help you understand how to do your homework, not to do it ourselves. Meaning that we need to see that you at least tried.

Said this, with the information I have I can tell you that probably you have to impose perfect reflections at the boundaries. Therefore in practice you write the equation of the wave and you impose that at the ends it is null. It is much equal to what you do for a vibrating string. Then with that you can find the wavelength of the modes and their nodes and the maxima it has, and also the frequency once you have the wavelength (use the dispersion relation for that).
 

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