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they will go to sleep when it is dark and there cage is covered with a towel and there is no noise
All what I can say is; I realise this noise around in the age of 6-8 in night while I go to sleep. At that time I thought this was the noise of insects and water boilers noise. It doesn't bother me. After that age I didn't have that. Now I am 58. About a year continuously more loudly and day and night I do hear. It doesn't hinder my work or my movement.
it depends
tires
are you sure is a valve noise?? or is a piston slap?
will tires make noise if there choppy on inside
The pitch of the propeller causes this noise.
What causes the a squeak in my showtime rotisserie
what kind of noise?
When they don't feel like making noise and at night.
Fruit bats.
a horse