How can i reduce the noise?

does the L3+ really work with 75 db?

i have no garage, i will use a room which is inhabited, but the neighbour have their bedroom under this room...

i read that the fans are not so noisy, its more the air which is sent out...

how can i reduce the noise?

I start to mine with the L3+ tomorrow...

and i want to build up a "Little Home Farm" with 5-10 pieces of L3+ Miners...

My Mathematics is good (so don´t talk with me about the costs )

I just need good tipps for the noise of 75 db...