The lowest note (fundamental note) emitted by any stretched string has a fundamental frequecy fo = V/2l = 40Hz The 1st overtone = 2fo = 2 x 40 = 80Hz 2nd overtone = 3fo = 3 x 40 = 120Hz 3rd overtone = 4fo = 4 x 40 = 160Hz 4th overtone = 5fo = 5 x 40 = 200Hz Overtones between 40Hz and 180Hz are 80Hz, 120Hz, 160Hz = 3 Overtones