This project was to learn acoustic survey technique and academic exchang in Boston, USA. I visit the Northeast Fisheries Science Center (NEFSC), which belongs to the National Marine Fisheries Service (NOAA), and also visit the Woods Hole Oceanographic Institution (WHOI). Study the signal analysis about trawl combined multi-frequency scientific echosounder in NEFSC with Dr. Jech. Implementation the calibrate work of multi-frequency scientific echosounde on the USA research vessel, Henry B. Bigelow. And analyzed the trawl – acoustic data, take the Atlantic herring for example. We also discussed how to plan the survey line in trawl-net fishing grounds.
In addition to visited the NEFSC, also discussed the result of ex-situ experiment about acoustic target strength research with Dr. Foote in WHOI. Understood the foreign experiment environment, and the standard scale of water tank. Finally, make a 1 hour presentation, which were about the in-situ and ex-situ acoustic research result of our research center. Listened the advice of researchers in WHOI, about calibrate, TS experiment and fishing grounds survey. At last, brought back several references which were useful to our future research.