My rear transducer has always made a clicking noise. Did some googling and they say its normal and a sign of a healthy transducer. They also say that it doesn't bother the fish. Well last weekend at Sardis, my US2 started doing it. Loud too. If I can hear it that friggen loud with it 2 feet under the water, how can they say that a fish doesn't notice it especially if your in 4 foot of water? Thoughts? Anybody else this lucky with your ducers?