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Posts: 479
Location: Eden Prairie & Pine Island | My rear Lowrance has its transducer mounted inside on the hull (fiberglass), and recently I started to hear it making a clicking sound. The graph works fine, but the noise concerned me, as I'd never heard it on other graphs. I called the Lowrance Tech Support, and they said that was normal, no problem. I asked if it might scare the fish off, and they saids no, likening it to a dog whistle in reverse i.e., we can hear it by the fish cannot. Anyone have any information or thoughts on this. I'm not sure I'm convinced this is okay, yet. Thanks. |
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Location: Hayward WI | Don't worry, Tech support is right. I"ve acutally had a muskie nosed up to the transduer on the bow mount trolling motor looking like it wanted a piece of it! |
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Posts: 6
Location: Antigo, WI | Sorry I can't help you with the problem, but the response you recieved from Lowrance, seems "fishy" to me. I would be willing to bet the fish can hear it. From my scuba diving experiences, you would be amazed how much you can hear when down on the bottom. Hope you can find a cure!!
Is it clicking against the boat? That's what I was thinking, but if it is just making a clicking noise, not hitting the hull, maybe the fish can't hear it. What do I know anyway I'm new at this whole thing. But having loads of fun learning!!
Edited by Sprout46 6/17/2003 9:47 AM
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Posts: 294
Location: Suspended | If you've ever tried an ice fishing style flasher out of the water you'll hear the clicking as well. That's how they work, by sending sound waves out and "hearing" what comes back.
The fish probably do "hear" it but the question should be does it scare or ward off fish? I don't think so, otherwise those of us who nail fish on the ice wouldn't be using flashers with such success.
How about this definition;
so·nar - a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects; also : a device for detecting the presence of a vessel (as a submarine) by the sound it emits in water |
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Posts: 736
Location: Hartford, WI | The Clicking sound is normal, it means the unit is working. My Garmin does the same, and it doesnt seem to scare the fish one bit.
Jim |
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Posts: 32958
Location: Rhinelander, Wisconsin | What you are hearing is the 'send' pulse form the transducer. That signal is projected downward by the transducer, and the receive cycle measures the elapsed time between the send and receive from any object reflecting a signal back to the unit. The signal is sent out in a spread called a 'cone'. A Lowrance covers a cone at the bottom about 1/3 as wide as the total depth. If you are in 30' of water, the cone will cover 10' at the bottom. The classic 'hook' eveyone looks for is created by a fish centered in the cone as the boat moves over it. The length of the hook is a measure of how long the fish was in the signal cone, with the thickest portion of the hook created while the fish is dead center in the pulse field. The actual measure of 'thickness' from the top center of the hook to the bottom center an indication of the fish's size. If the fish is in the cone, is not moving, and neither is the boat, a line will appear all the way across the screen. Long hooks indicate fish in the pulse field a long time. Hard objects or bottom will create a 'thick' reading on the screen, sometimes doubled, soft will create a narrower reading. A 1/2 hook indicates the fish was in the outer reaches of the pulse field toward the outer edge of the circle or cone of received pulse. If the boat is in 10' of water, an overall average of weedline depths, the cone AT THE BOTTOM is only three feet across. Getting a fish dead center in the cone at 10' creating a perfect hook on the screen is not too common. |
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Location: Woodstock, IL | If you can't hear that sound coming from your transducer, hold your hand against it. You'll feel the "pulse". The sonar has to be on when you do this. I can hear it easily, but have been around those who cannot due to partial hearing loss. |
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Posts: 479
Location: Eden Prairie & Pine Island | Thanks guys for bolstering my confidence. I've had other LCRs whose transducers I could not hear, so this seemed strange, but I guess there is nothing strange about it. |
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Posts: 1185
Location: Wishin I Was Fishin' | The locators which you couldn't hear the clicking probably weren't as powerful of units. Watts. |
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Posts: 19
Location: Oshkosh,WI | Everyone is correct by saying that it should be clicking. But...I icefish allot!!! Using these new flashers with high power will scare fish. Out in Devil's Lake the fish are very flasher spooked. I have done many comparisons between flasher and no flasher with a camera and I will say that I can see very cleary that fish can hear and more often feel the pulse. A good way to show how strong it really is; when the boat is in the water put your hand right under the transducer and you should feel almost a shock sensation go through your fingers. This works very good on the new Lowrance and Bottom Line locators due to the high amount of power.
Although the fish can feel and hear this I dont think they are affected all the time. While ice fishing it seems if the bite is good it does not make a difference. Fish eat regardless. But I have had days where if I was fishing with a flasher and not having fish come to the bait, I would drop a camera down and turn off the flasher...BANG!
Just my thoughts and experiences....Hope it helps a little.
Troy |
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Transducer Clicking Sound