Effect of amount and pipe size on resonance frequency

In the field of acoustic physics required a certain material to make a room to have better sound quality. One of the materials that can be used to manipulate sound resonator panel. In general, the panel used is made of wood and box-shaped, but in this study used resonator pipe which is a half-cylinder pipe. The panel variations used are 1.5″, 2″, and 2.5″ with pipe length 60 cm. While the variation in the number of pipes is 1, 3 and 5. The measurements are done in the semianechoic chamber at the acoustic physics laboratory, the physics department of FIA ITS based on the method written by C. Lagarrigue. In resonator measurement, resonance capability is measured. From the results of the measurements, the resonance frequency for the 1.5″ pipe size with the number of pipes 1, 3 and 5 all resonance at 40Hz, 80Hz and 400Hz for size 2″ pipe size is 40Hz, 80Hz. And the 2.5″ pipe has a resonance frequency at 40Hz only. From the measurement results it is seen that the addition of the number of pipes resulted in the decreasing some point of resonance frequency.