Corrections

They just wait till the dolphins come by the boats then put these long poles in the water, which have a flange on the bottom and they just bang on these poles with hammers and they create a wall of sound which frightens the dolphins.

There were several hundred dolphins being driven ashore，and they were all running for their lives, running from this wall of sound . by the time they get to the lagoon, they are totally freaked out.

They seal it ,then they go home…