Abstract
The objective of this study is to improve the lower frequency sound of the sound source, which derives from the diameter and the speed of water-droplets, in the water musical instrument. Their diameter and speed are changed by varying nozzle diameter and water pressure, respectively. As a result, the lower frequency sound based on the vibration of large air bubbles is influenced by the nozzle diameter, but its frequency is not in proportional to the size of nozzle diameter. The quality of the sound radiated from the water musical instrument is improved by matching the diameter of the air bubble to the length of the resonant pipe.
