Buzzing sound like electricity??

[AbenF]

Originally Posted by Matt Johnson

Is it coming through the hull below the water? If so, it's shrimp eating things off the hull. Very common- I tore apart the boat the first time I heard it looking for a running pump. Their munching is mechanical and electrical sounding.

Matt

Second that. I awoke one morning to find a newly-arrived boat emptying their lockers onto the dock. They figured a rat had gotten into the potato chips but couldn't find it anywhere. Their boat had been up the river, and so they'd never heard the shrimp on the pilings.

Interesting side note on those shrimp - they hang around the pilings, and the "snap" is because their claws fire so fast they pull a vacuum in their joint, and what you hear is that vacuum imploding.

If your sound is a hum that's close to the 60 hz tone you hear from a bad stereo or battery charger, it could be a fish called a midshipman. They're remarkably loud for a small fish, and they don't move around much. But they do turn on and off, with the hum lasting up to about an hour. You can find some recordings of them online.

[pjShap]

Another possibility if the boat has been sitting a long time is battery water boiling from a partially shorted lead plate. You can check each battery case temperature with your hand. The bad battery was significantly warmer than the others, and when I put my head nearby I could tell the sound was coming from the battery. It was also using up water.

[chasfgr]

First locate where the noise is coming from.
If you don't have a stethoscope use a hammer or screwdriver to localise the source.
Without some way of reducing the possible 112 reasons for the Ill-described noise, you'll probably be many years trying to stop it.

[Icarus]

Buzzing shrimps?
I would think the rigging is humming...?
Hard to give any advice other then check the electric equipment like battery charger etc first, just in case.
Refrigerator?
Back to the humming prawns?

[chasfgr]

Originally Posted by Icarus

Buzzing shrimps?
I would think the rigging is humming...?
Hard to give any advice other then check the electric equipment like battery charger etc first, just in case.
Refrigerator?
Back to the humming prawns?

Shrimps definitely crackle - lobsters click.
Humming I'd suspect rigging - but until you try and locate the source, you're feeling around in the dark

[GPguy]

Try easing the topping lift. I had a similar situation and thought it was a noise coming from a large Coast Guard ship that pulled in after dinner one night. The next day it left and the electric humming started up again around sundown. (Off shore breeze started up again). My curiosity took me up on deck and as I leaned on the boom to contemplate the mystery…. I felt it vibrating like a guitar string.

[Mickeyrouse]

Originally Posted by Tayana42

+1 it’s Shrimp.

And get a net.