International Journal of Engineering and Technology

This research is about adjusting indoor frequency response by using room equalizer based on portable variable absorbing plate. Room equalizer is an equalizer that can be applied to different places. For graphic equalizer or parametric equalizer which are used generally in the field if it is equalized to adjust frequency response sound signal gives similar effect to that of going through electronic devices such as condenser or coil. At this time, phase shift of signal takes place and this influences on sound quality. The purpose of this research is to make frequency response that has no distortion of original sound. This is done by reducing phase shift and equalizing by adjusting response of absorbing plate. Therefore, to overcome these problems, this research suggest room equalizer which can be applied to different places and time by using outstanding space matching with high sound sustainability.