响度降低 meaning in English

loudness reduction

Abstract : the colored sandwich steel plate has been successfully used in the noise control at the cooler center in the paint shop of dcac wuhan factory , expressed with laudness index , noise level is reduced 79 . 65 % after control . the effect is very excellent
文摘:在噪声治理中，采用彩色夹心板作隔声构件，在武汉总厂涂装分厂制冷站应用成功，用响度指数这个绝对数表示，治理前后噪声总响度降低79 . 65 % ，隔声效果非常好，达到了预期的目的。