SOUND ABSORBING STRUCTURE FOR ANECHOIC CHAMBER AND ANECHOIC CHAMBER INCLUDING THE SAME

摘要

The present technique relates to a mold comprising an opening; A perforated plate-shaped member formed in the outer frame and including a front face opposite to a rear face of the outer frame facing the opening; And a rear sound absorbing member inserted between the rear surface of the perforated sheet member and the opening of the outer frame, an outer frame including an opening; A perforated plate-shaped member formed in the outer frame and including a front face opposite to a rear face of the outer frame facing the opening; A front sound absorbing material inserted between a front surface of the perforated sheet member and the outer frame; And a rear sound absorbing member inserted between the rear surface of the perforated plate-shaped member and the opening of the contour mold, and an anechoic chamber including the same. According to this technology, the resonance effect due to the vibration of the perforated plate-shaped member and the resonance effect are enhanced, and the excellent sound absorption effect in the low frequency band is exhibited by the action of the resonance frequency and the rear sound- At the same time, the front sound absorbing material located on the front surface can exert an excellent sound absorbing effect in a high frequency band. Further, by combining such a sound absorbing effect, the sound absorbing effect in the middle frequency band can be also increased.