If you didn’t get the question, what makes peoples’ voices different even if they try to make everything the same.
In: Biology
A sound is actually a pressure wave traveling through a medium (usually the air). Unless that wave has a perfectly sinusoidal pattern (a sine wave), it will contain some amount of variation in its shape. Those variations are interpreted by our brain as timbre, or tone color.
Topics for further research:
Harmonic Series, Fundamental Frequency
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