A quiet sound from imac(4k) like boil, is this normal?

Hi all.
In the morning, I am especially sensitive and today I noticed that like my imac 2017 boiled, that is, a noise at him as if to boil, I would not say that loud, say so fairly quiet, is this normal?(bought recently) or does it have problems?
March 23rd 20 at 18:52
1 answer
March 23rd 20 at 18:54
Record this sound on telephone voice recorder, amplify the audio editor and put here.

As a variant — take on the service. Can cooler rustles so. I like buying the Secretary, so he to clean the office less than a year dusty.

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