A lot of the soundproofing threads talk about doing it once and doing it right the first time. I‘m satisfied with the level I chose and wouldn’t change much unless someone gave me a much bigger budget, with a couple of exceptions.
One of those is the in room noise from the projector and the inline fans which bring air in and take air out. A year ago, it didn’t bother me, but you get used to the pitch black and the low noise floor and soon noises or reflections that you didn’t see before are really noticeable.
So, I’m after suggestions to reduce the fan noise.
There are two of these. Big 5’’, ultra quiet!!!, in-line fans. Both are housed in the soffits.
I added lots of sound proofing around the fans originally. The fan attaches to the wall via a rubber mount to reduce vibrations.
The soffits are 12mm MDF on all sides. The vertical parts also have 12mm or 18mm OSB, forget which. All soffits are filled with fibreglass insulation. I then made this panel to sit loose under the fan.
2 x 12mm MDF and two layers of lead. They were really heavy!
If I remove that panel I’ll have about an inch around most of the fan. What can I do?
Ive not used TECHSOUND but seen others use it.
@Triggaaar I know you’ve used it loads. What are your thoughts on sticking multiple layers over the fan. Is it self adhesive? Would lots of layers of this be better than the loose insulation?
Only other options are buy a different fan (big expense) or just not use them, waste of money. I’m also then worried that the projector would over heat without an air supply at the back, even if I use an AC Infinity USB fans to remove air at the front.
As a reminder, the first fan draws air from the adjacent room and then vents it behind the projector intake vents. Lefthand side, pipe not attached yet in this picture.