Just another compressor sound enclosure

[rcx132]

My compressors were behind the garage out of ear shot. But recently a neighbour said that some houses can hear them as they are in line of sight of them. So built a sound enclosure:

The enclosure uses two sound mufflers, one on each side, one for air in, other for air out.

Forced air to keep the pumps cool:

I rubber mounted the pump and motors to stop sound going down the pump+motor stand.

Sound insulation is a layer of Wickes low density sound insulating rockwool and convoluted foam.

I used steam hose to create a flexible connection from pump to enclosure (photo missing). Then copper.

The compressor valves are on the side as I've got two pumps so need them to merge before going to the air tank.

So that's it. The noise is about one third now, you can talk over them. But one thing I think I'm seeing is that the sound insulation and mufflers have outdone themselves, they are pointlessly working too well because the noise that is escaping seems to be getting out thru the pipes. If I was to do this again I'd use less insulation and only one bend in the mufflers to simplify the enclosure.

 

[rcx132]

Another pic, just to show where the "mufflers" are, one on each side.

I've noticed Toolstation sell a much wider range of brass fittings these days which brought the cost right down as needed quite a few fittings to plumb it all up.

 

[rcx132]

Just a point.... you may have noticed in photos use of barrier pipe to connect the tank to the pumps. I think that's illegal to do in a work place. I did it here as a temp measure in non work environment, while using protective equipment. But as rule DON'T USE BARRIER PIPE !

 

[Parm]

Looks good and well thought out, Be interested to find out how effective the enclosure is

It’s always the low frequency noise that difficult to control as it has such a long wavelength

 

[500e]

The brass pipe screwed to cabinet may be working as a sound board, would suggest all pipes inside & on isolating mounts & where you exit the unit a grommet style fitting to insulate any vibes from the box