All musical notes involve regular,

All musical notes involve regular, repeating vibrations in the air. When you were humming any single note just now, you were producing a regular vibration with your vocal cords which was repeating itself many times a second; when I hum ‘Baa’ my vocal cords vibrate about a hundred times a second. When I hum the note for ‘Black’ I have to produce a higher pitch note and I do this by increasing the number of vibrations I produce every second.So, whether the note is produced by a vibrating string or the vibration of your vocal cords, higher pitch notes involve more vibrations per second. Every melody is made up of a string of notes of different pitches.