Question

In order to recognize a vowel when sung it must have at least how many overtones?

Answer 1

Answer:

2

Explanation:

So "overtone" is an umbrella term, and there are two types of overtones: (1) "harmonic" overtones (which are integer multiples of the fundamental frequency) and (2) overtones that aren't integer multiples of the fundamental frequency (I'll call these disharmonious overtones)