Abstract
In the research of the sound quality of a classic guitar, the control of the vibration modes on the surface board is important. The envelope shape of the sound peak points on the frequency domain takes part in the tone color. The sound continuity is indicated by the damping wave shape. The glottal stop sound has the rapid by the diffusion of the vibration energy with creating the sound strongly. The unclear sound is caused by the lack of the high frequency sound amplitude. Here is the study for the behavior of the above sound qualities.
