Is there anything that you can do with the information?
When I dove last I could hear plenty of croaking. It was really the first time that I was confident that what I was hearing was wsb croaking. Now that I know what it sounds like I know that I have heard it before and close by.
So I am curious, can you do anything with it other than know that they are in the area? Can you determine depth by where you hear them or does it permeate the entire water column? Does hearing it indicate that they are undisturbed or not?
Thanks.