The performance improvements of SOnic Detection And Ranging (SODAR) necessitate designing efficient acoustic antennas for the Atmospheric Boundary Layer (ABL) measurements to enhance the data availability of weak echoes. An efficient acoustic antenna needs to optimize electrical to acoustic and acoustic to electrical conversion efficiency measured at the antenna axis. It also needs to provide a good directional response and to handle atmospheric noise. Acoustic antennas designed using moving-coil transducers, parabolic dish and acoustic baffle should provide better characteristics. In the present research work, several types of Acoustic Composite Material (ACP) for acoustic baffle have been tested to their characteristics Sound Transmission Coefficient (STC) and Noise Reduction Coefficient (NRC). Based on these characteristics, the whole testing is performed in the reverberation chamber and a comparative study of transmission loss and absorption is elaborated. It is concluded that baffle (ACP sample 2 with foam) is the suitable material with STC (34) and NRC (0.98). Also, an acoustic antenna has been designed using ACP sheets with foam and tested all the components i.e. transducer, disc and baffles in the acoustic anechoic chamber and reverberation chamber, to analyse the axial transmit and receive conversion efficiencies and directional response.

声波探测和测距 (SODAR) 的性能改进需要为大气边界层 (ABL) 测量设计高效的声学天线，以增强弱回波的数据可用性。高效的声学天线需要优化在天线轴上测量的电到声和声到电的转换效率。它还需要提供良好的方向响应并处理大气噪声。使用动圈换能器、抛物面盘和声障板设计的声学天线应提供更好的特性。在目前的研究工作中，已经测试了几种用于声障板的声学复合材料 (ACP) 的特性传声系数 (STC) 和降噪系数 (NRC)。基于这些特点，整个测试在混响室中进行，并对传输损耗和吸收进行了比较研究。结论是挡板（带有泡沫的 ACP 样品 2）是具有 STC (34) 和 NRC (0.98) 的合适材料。此外，还使用带有泡沫的 ACP 板设计了声学天线，并测试了声学消声室和混响室中的所有组件，即换能器、圆盘和挡板，以分析轴向发射和接收转换效率和方向响应。