acoustic blanket meaning in English

吸声垫
音响遮掩机声

According to their space position , the seismic features of shallow gas in this region can be divided into three groups : ( 1 ) features in the stratum : acoustic blanket , acoustic curtains , acoustic turbidity , irregular strong top reflection boundary , and phase pull - down in both flanks ; ( 2 ) features of the seabed : seabed pockmark and giant sunken pit ; ( 3 ) features in the seawater column : acoustic plumes , cloudy turbidity and point - line - type reflection
该区的浅层气地震特征按空间位置分为3大类： ( 1 )地层中的特征：声学空白、声学幕、声学扰动、不规则强反射顶界面、两侧相位下拉； ( 2 )海底面的特征：海底麻坑、大型塌陷坑； ( 3 )海水层中的特征：声学羽流、云状扰动、点划线反射。