If we incorrect please show me where
Ok I am been learning that the sine wave is the fundamental tone
and their are over tones and harmonics
The even numbers are musically harmonics tones that support the fundament tone the sine wave
And then there the odd harmonics tone which are non musically
This is actually a very technical and mathematical subject, so I don’t know the exact proportion. But as far as I know, the strongest harmonic overtones are multiples of the base frequency. But you will have a harmonic series based on divisions of the main frequency too. Here check this video:
Correct …odd order harmonics are “not as pleasant” to the ear…