In this paper, we examine the characteristic of samulnori by the sound analysis techniques. Four instruments of samulnori are constituted with the dual principle of the negative and positive (the male and female) which mean the harmony of each instruments high and low sounds. These sounds are covered the audible whole sounds. Since the fundamental frequencies of jing and janggu sounds are similar to the fundamental frequencies of male and female speech respectively, we feel the affection when we hear the sounds of jing and janggu. Additionally, since human feels the sound not only by ears, but also by the vibration to the skin, the put jing and janggu have the remarkable characteristic of the vibration.