Acoustic signal of Javanese 56 cm brass kempul
Matias H.W. Budhiantho, Dhia Salim · Journal of Physics Conference Series · 2018
The 56 cm Brass Kempul Gong is regarded to produce better musical sound compared to its sibling one that made of iron. This study aims to investigate the spectral and temporal properties of that Gong. Acoustic measurements were conducted and sounds analyzed using the PC program, ARTA. Both frequency and time domain signals were explored and compared to a similar kempul made of iron. The fundamental frequency, which decays much more slowly than the other harmonics, starts with a lower, increasing frequency. The wave-like sound of the Gong is due to signal behavior that resembles the primary and secondary mistuned beats of its second and third harmonic frequencies.