harmonic series
sequence of sounds where the base frequency of each sound is an integer multiple of the lowest base frequency
en-US/hɑɹˈmɑnɪk ˈsiɹiz/
en-GB/hɑːˈmɒnɪk ˈsɪəɹiːz/
sequence of sounds where the base frequency of each sound is an integer multiple of the lowest base frequency