An explanation of why blowing in a bottle makes a sound, basically explaining how Helmholtz resonance works and how to bottles are Helmholtz resonators. The same explanation works for what role the speaker plays in moving objects/bottles using sound, the acoustic propulsion in one of my other videos below. This also explains a bit about resonant frequency and compares the sound wave compression and decompression to an oscillating spring, a simple harmonic oscillator.

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See also:

How to Move Things with Sound/Acoustic Propulsion
   • How to Move Things with Sound/Acousti...  

How to Make/Build a Lifter or Ionocraft
   • How to Make/Build a Lifter or Ionocraft  

Piezoelectric generator LED lit by rain water
   • Piezoelectric generator LED lit by ra...  

And more of my sound related videos:

How to Make Music Instruments with Straws - Trombone and Trumpet
   • How to Make Music Instruments with St...  

Also see my webpage about moving things with sound and Helmholtz resonance:
http://rimstar.org/science_electronic...

3D modelling and animation done using Blender 2.63.

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Music used:
Bicycle Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
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ISRC: USUAN1100870