摘要
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 new broadband measurement facility for acoustic characteristics of underwater acoustic materials in free fields is described in this paper. The complex sound pressure reflection coefficients （echo reduction）, complex transmission coefficients （insertion loss） and absorption coefficients can be measured for large area samples in an open anechoic tank. Moreover, it is a test （or calibration） standard system to investigate and assess the properties of underwater acoustic material devise in the sonar underwater acoustic system and submarine sound stealth engineering. The broadband compressed pulse superimposition method and the broadband directional sound source are applied in the facility. The lowest measurement frequency is i kHz for the typical large area samples with the size of 1.6 m~ 1.8 m. Utilizing the steel standard sample, the measurement results and theoretical values of acoustic properties have been compared, it shows that this facility can be provided with good precision and reliable measurement data.
出处
《声学学报》
EI
CSCD
北大核心
2011年第5期534-541,共8页
Acta Acustica
