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The noise is simply made by air vibrating down tubes of different lengths and diameters.

Blowing across the tops of the tubes sets up a vibration. The frequency (pitch/note) is determined by the physical dimensions of the tubes.

If you blow across the top of an empty bottle you will hear a note. Try blowing across the top of a different sized bottle, or a bottle partly filled with water and you will get a different note.

Pan pipes are constructed to take advantage of this phenomenon.

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16y ago

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