How to reduce the fan speed on a laptop?

Question

linux

Good afternoon.
There is a laptop Sony VGN-Z51VRG
It is running Xubuntu 16.10 x64
Everything is fine, except for the strong fan noise.
Connoisseurs, tell me how you can reduce the number of revolutions of a laptop fan from under Ubuntu?
Thank you.

Answer 1

Is there a fan speed setting in the BIOS?

Answer 2

On simple laptops, not about the game, it is impossible to change the speed. At least I tried. Even lowering the frequencies to ~ 800 makes noise, because the minimum speed does not change. As it was already said, it is not so much the fan that makes noise as the air beats against the radiator.