How can I make a cheap projector quieter?

How can I make a cheap projector quieter?
Here are some tips which could make your projector quieter.

Lower refresh rate in Windows.
Clear the vent from dust.
Carpet on the wall.
Build a hush box for your projector.
Switch to eco mode.
Cool the room.
Place a cooling pad under the projector.
Move the projector away.

Here are some tips which could make your projector quieter.
  1. Lower refresh rate in Windows.
  2. Clear the vent from dust.
  3. Carpet on the wall.
  4. Build a hush box for your projector.
  5. Switch to eco mode.
  6. Cool the room.
  7. Place a cooling pad under the projector.
  8. Move the projector away.