Harmonics: Feynman's Physics Explained
For a simple vibrating string, the mode frequencies are whole-number multiples of the lowest one — these are the harmonics. The particular mixture of harmonics gives an instrument its 'timbre.' A flute is nearly a pure fundamental, while a violin is a rich blend of many harmonics. That is why they sound so different even playing the very same note.
The big idea
The recipe of harmonics is what makes each instrument sound unique.
Think about it
A flute and a violin play the same note. Why can you still instantly tell them apart?
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