Illustrate the modes of vibration of the fundamental and the first two overtones when a musical note of fundamental frequency 256 Hz (cycles per second) is produced by air in a tube: (i) open at both ends; (ii) closed at one end. Mark nodes and antinodes of displacement N and A respectively. Ans: Please see my figure. Is my drawing right? Anythign wrong? State the frequencies of each pair of overtones. Ans: The frequencies of overtones are 3*256 Hz and 5*256 Hz respectively, right? Why a musical note produced by an open tube or pipe more mellow than a note of the same fundamental frequency produced by a closed tube? Ans: Because the antinodes are produced at both ends in an open tube, the sound is weakened.