Authors : Bong-Young Kim and Myung-Jin Bae
Abstract: Palgong mountin near Daegu Metropolitan City has drum-sound rock which is known to play drum sound as if by magic. The drum-sound rock is about 3 m in size with a wide, flat surface and is reminiscent of a large drum. The drum has a structure in which diaphragms face each other with empty space in between. When strike one side both diaphragms and voids sound and the sound is sustained. The drum-sound rock also has two large plates facing each other and it is empty so that when the rock is hit, it resonates and sounds like a drum sound by continuing the sound through the empty space. In this study, sound from drums-sound rock of Palgong mountin is analyzed by sound engineering through comparison of spectrum and reverberation time it is scientifically investigate how similar it is to actual drum sound. Results of comparative analysis of each sound for drum sound, wooden gong sound, drum-sound rock. While the usual rock resonates at 1,700 Hz, the resonance frequency of about 250 Hz in the drum, about 600 Hz in the wooden gong about 400 Hz in the drum-sound rock appear, so that, the drum-sound rock has a sound component close to the drum sound. However, drum-sound rock has a reverberation time that is significantly shorter than drum sound which sometimes sounds like a wooden gong sound. The longer the reverberation time of the drum-sound rock sound, the more it sounds like a drum sound.
Bong-Young Kim and Myung-Jin Bae, 2018. A Study on the Sound Characteristics Analysis of Drum-Sound Rock. Journal of Engineering and Applied Sciences, 13: 4414-4418.