论文部分内容阅读
介绍一套新建的水声材料构件声学特性自由场宽带测量装置,在开放消声水池中测量水声材料构件大面积样品的复声压反射系数(回声降低)、复声压透射系数(插入损失)和吸声系数,为研究和评定声纳水下声系统、潜艇声隐身等项目所用的水声材料构件设备声学特性提供了标准测试/校准系统。装置应用了宽带压缩脉冲叠加法和宽带指向性声源,最低测量频率为1 kHz,典型大面积样品尺寸为1.6 m×1.8 m。利用不锈钢标准样品进行了验证试验,声学性能测量结果和理论值比较显示装置具有良好的测量精度,测量数据准确可靠。
A set of new free-field broadband measuring devices for acoustical properties of underwater acoustical material components was introduced. The complex acoustic pressure reflection coefficient (echo reduction), complex sound pressure transmission coefficient (insertion loss ) And sound absorption coefficient. It provides a standard test / calibration system for the study and evaluation of acoustical properties of underwater acoustic material equipment used in submarine underwater acoustic systems and submarine acoustic stealth projects. The device uses a broadband compressed pulse superposition method and a broadband directional sound source with a minimum measurement frequency of 1 kHz and a typical large-area sample size of 1.6 m × 1.8 m. The stainless steel standard samples were used for verification test. The results of acoustic performance measurement and theoretical comparison show that the device has good measurement accuracy and the measurement data is accurate and reliable.