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角锥形空间吸声体是我院土木系陈绎勤教授多年来从事减噪研究的重要成果。太原合成纤维厂弹力丝车间,经过采用角锥形空间吸声体和吸声饰面处理后,使车间内强烈高频噪声的直达声由原来的101分贝(A)降低到93分贝(A),减少了 8分贝(A);混响声由原来的96分贝(A)降低到86分贝(A),减少了10分贝(A),即降低噪声响度50％。工人们反映,在未进行这种吸声处理以前,感到车间内的高频噪声极为强烈刺耳,使听力和神经系统、心血管系统均受到严重损害,特别是在值夜班时感到恐怖。进行上
The pyramidal space acoustic absorber is an important achievement of Professor Chen Xiqin of the Department of Civil Engineering in our college for many years engaged in noise reduction research. Taiyuan Synthetic Fiber Factory’s elastic wire workshop, after adopting a pyramidal space absorber and sound-absorbing finishes, reduced the direct high-frequency noise of the workshop from 101 decibels (A) to 93 decibels (A). A reduction of 8 decibels (A); the reverberation noise was reduced from the original 96 decibels (A) to 86 decibels (A), a reduction of 10 decibels (A), ie, a reduction in noise loudness of 50%. Workers reported that before this kind of sound absorption treatment was performed, the high-frequency noise in the workshop was felt to be extremely harsh, and the hearing, nervous system, and cardiovascular system were severely damaged, especially when they were on duty at night. Carry on