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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 use the volume control buttons located on the right hand side of your iPad.
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.
A change in temperature will result in a change in the speed of sound. The frequency of a flute organ pipe is proportional to the speed of sound. For example, an increase in temperature will cause an increase in the speed of sound, and hence the pitch of the pipe will go up. A change of about 4oC will cause a change in the pipe's sound frequency of about 1%. That compares with a change of 6% between adjacent notes on the keyboard. Hence such a change would be significant.The same effect occurs for the woodwind and brass instruments.
Fog?
a loose or slipping belt