Pengaruh Sisipan Resonator Celah Sempit pada Serapan dan Respon Spasial Quadratic Residue Diffuser Erna Y. Devitasari, Arifatul Chorida, Eki Muqowi, Nining Haryanti, Harjana, Iwan Yahya

Abstract

The influence of slit-like resonator on the sound absorption coefficient and spatial response of quadratic residue diffesr has been done both by experimentally and computer simulation. Laboratory work has been done by using impedance tube technique refer to ASTM E-1050-98 for measuring the sound absorption coefficient of the diffuser element, while AFMG Reflex has been utilized for simulation purposes. The results shows that slit like resonator insertion bring accumulative increment of the sound absorption coefficient on the high frequency range above 800Hz. In addition, a significant omnidirectional spatial response also occur when the slit like resonator is inserted into standar QRD. Those phenomenon not occured on the lower frequency band due to the resonator depth that very small compared to the wavelength of the waves at low frequency band.