The fog horn noise when flushing a toilet is caused by the sudden rush of water through the pipes, creating vibrations that produce the sound.
The only place that sound would come from would be a valve being closed. The only valve is the one in the tank. Replace the valve and this should eliminate that noise. To check this out try closing the water shut off part way and see if noise changes or goes away.
A horn blows air and makes a noise
An air horn has a small air compressor which generates a movement of air through the device at speed. When the user of the horn presses the button, the horn creates a noise.
boop
toot
The noise of a car horn.
The crowd have a sort of horn type instrument, that makes that noise.
Honk or honking sound.
if your horn is stuck on makin noise pull the fuse out... or you can remove the whole horn assembly from underneath the hood
The noise you hear is the horn relay clicking. The reason your horn does not work can be two things. Either you have a faulty horn, or you have a bad connection where the wire hooks to the horn.
you take out the alernator and rewire it to your battery, this will make a horn noise when you rev the engine backwards
it makes a horn noise when you are in a vehicle.