What will be the best approach to be implemented in suppressing noise in a room with different engines located?:cool: :cool: :cool:

Like your other post, you'll find a lot of people reluctant to do your homework for you.

Post some original thoughts and ideas and you might engage a discussion.

Hi,
The only reason engine noise would bother anyone, is if they are not wearing hearing protectors.
Require anyone in, or near the room, to wear hearing protectors. It comes under some State laws with various State Agencies.