Flowbench noise reduction

[Tony]

Nothing actually comes out of the motor except flashes of light.

[rwdford]

I was looking into "sound proofing" materials and it seems there are many options, rubber sheeting is one, another is sound proofing dry wall, foam and other materials are good too but may be more useful for removing echoes/improving sound quality in rooms rather than reducing noise levels plus those materials are flammable, I think rubber sheeting or dry wall materials are the best options, will look into it more, if I can find a relatively cheap material I will share my findings

[Tony]

Keeping the noise out is very different to holding noise in.
To keep noise in and prevent it escaping, you need sound absorbing material.
Something soft and yielding and non reflective that absorbs the sound energy to kill any echo.

[Brucepts]

Look to the guys who build speaker cabinets

I'll say this though . . . don't make this harder than it needs to be.

I recall Malvin saying to me in the shop about how quiet the PTS Design actually is, the MDF goes a long way in killing the noise. The large exhaust dump area also adds to the noise reduction as it just dumps the air out to the room.