1.EC6061 http://cnsmoc.com/wp-content/uploads/2015/07/EC6061VP1000.pdf ![](https://hackmd.io/_uploads/BkmTKhoF3.png) 2.EC6081 https://www.teledynemarine.com/en-us/products/SiteAssets/RESON/EC6081mk2%20-%20Product%20leaflet.pdf ![](https://hackmd.io/_uploads/rkrZchiY2.png) 3.EC6067 http://www.shuitingqi.com/UpLoad/202011/2020110349734629.pdf ![](https://hackmd.io/_uploads/SJGicnitn.png) ![](https://hackmd.io/_uploads/S1BC9hiK3.png) 使用: ![](https://hackmd.io/_uploads/HyBNs3iY2.png) 水聽器: https://www.teledynemarine.com/en-us/products/product-line/Pages/Hydrophones%20&%20Transducers.aspx https://www.grasacoustics.com/products/preamplifiers-for-microphone-cartridge/constant-current-power-ccp/product/696-26ci https://www.grasacoustics.com/products/preamplifiers-for-microphone-cartridge/constant-current-power-ccp/product/203-26ca