What do the fans sound like

I came from a PC world and when the fans kicked in on those laptops you thought a plane might be taking off. My Macbook Pro is not hot and I do hear what I think are the fans on each side, more of a "whooshing" type sound. Is that what I should be hearing? Just not use to the relative quietness of this machine so wanted to check to be sure. Thanks in advance.

The fans have a very distinctive sound and they seldom ramp up. However, when they do begin to cut in, the sound is a very progressive spin-on that last about 30-seconds to full speed and they will generally run for about 1-minute and slowly spin down at the same rate. The whole process can last about 90-120 seconds.
Regards,

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