I really think this is a better question answered by a fish biologist. In some quick looking around I, who is not a fish biologist mind you, found that fish “hear” frequencies in the 0 – 1000 Hz range. This is far lower than 200 KHz (20,000 Hz) that both the Marcum and Vexilar transmit at. If a fish can not hear sounds at that frequency then it should not matter how much power is behind the signal. In being a bit more curious I went and looked at the hydrowave because that is meant to send out sounds in the fishing “hearing” range and sure enough it is sending out very very low frequency in the 1 -100 hz range.
January 19, 2014 at 9:38 am
#1380878