Is there a ‘mathematical’ reason that the music notes in chords ‘work’ together?

Question

I recently learned that the wavelength of a note is half that of the same note one octave lower. Do the wavelengths of the notes in a chord have some sort of similarities? Is there another reason that the notes sound good together?

In: 21

Answer 1

The sounds that sound pleasing together create nice simple whole number ratios when their wavelengths are played together. If their wavelengeths don’t do this, they tend to create little spikes of high frequency noise that people find unpleasant.