Abstract: The acoustic signals are collected by using miniature microphone and the virtual frequency spectrum instrument based on sound card if the watered glasses with different volume water are struck. The value of pitch is obtained by using the analysis of frequency spectrum picture. The data is fitted using the software Matlab and the conclusion is drawn that the relationship of the different volume water and the pitch. Finally, the effect of different striking points versus the pitch is also studied.

Key words: watered glass chime bell, pitch, FFT, frequency spectrum analysis