2019 : Acoustic performance of sonic crystal made from a half of PVC pipe
As an alternative ingredient that is safe for health, the sonic crystal (SC) is expected to provide acoustic performance like other acoustic materials. Generally, SC is designed with certain forms and formations. This paper discusses the performance of SC made from a half the PVC pipe with diameter of pipe is 3, 8 cm, 5.1 cm and 6.8 cm, with the direct angle of sound 90. The parameters that measurement is the resonance frequency. Based on the measurement result, the resonance frequency value is 40 Hz, for a diameter 3, 8 cm then 63 Hz for diameter 5.1 cm and 6.8 cm. Beside as a resonator, the sonic crystal was design able to absorb the sound.