This problem is most likely due to a shock absorber or strut issue.
Iron in the water would cause rusty stains in the toilet.
Of what?
A worn out clutch release bearing would cause a whining sound when you put your foot on the clutch.
the strings
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.
You will have to be more specific. Describe this strange sound.
a dining sound could be lose nuts on the exhaust
it was meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
I would expect any movement of matter to cause some sound.
Fog?
a loose or slipping belt
would the fan belt on a v8 motor cause squeaking