8mm Forum: Projector Sound Proofing

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Topic: Projector Sound Proofing

Roger Shunk
Jedi Master Film Handler

Posts: 604
From: Phoenix, AZ
Registered: Nov 2011

posted November 19, 2012 06:21 AM

Is there any type of material that you can place under the projector that help will absorb or deaden the sound of the machine running? Carpet etc? I was just curious if anyone out there has tried something that really helped quiet the machine running?
Thanks,
RS

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James N. Savage 3
Phenomenal Film Handler

Posts: 1375
From: Washington, DC
Registered: Jul 2003

posted November 19, 2012 09:31 AM

Hi Roger-

I had actually built a cart with a sound-proof wooden cabinet on it. The inside of the box was lined with pieces of gray foam, and it had a square glass window in the front and a hinged door on the side. I did an article for Reel Image magazine with pictures. Its been about 10 years so I don't know if I can still find the article.

Once I got the BAUER T-610, I stopped using the cabinet altogether, since this projector is so quiet.

James.

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted November 19, 2012 09:56 AM

I messed with this question about 6 months ago. I thought maybe the machine was vibrating the table under it and making the table top a resonator to spread sound out into the room.

So I faked an insulator by picking up the machine when it was operating and found it made absolutely no difference!

My new thought is between the rubber feet on the machine and the pad under the tablecloth and the fact that the table top is a slab of oak maybe 3/4" thick, this settup is pretty much accoustically dead.

Roger,

If you try to do the same experiment you can find out if you actually have a problem in the first place and take it from there.

Phone books would also be good for making test pad (the more people in your area code, the better!). This would allow you to move around the room and listen.

--------------------
All I ask is a wide screen and a projector to light her by...

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Rob Young.
Phenomenal Film Handler

Posts: 1633
From: Cheshire, U.K.
Registered: Dec 2003

posted November 19, 2012 10:21 AM

I've alway a built my projector stands around these kind of adaptable stands.

http://www.apollohifi.co.uk/Products/Products.html

Not cheap, but beautiful, purposeful and problem solving.

The great thing is, you can re-build them in the future when your home cinema needs change.

Of course, many here will poo poo this as expensive non-sense.

But that is because they haven't ever used them.

Even several shelves high in an open room, your projector will never sound more quiet.

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Grant LoPresti
Junior
Posts: 15
From: Portland, Oregon. USA
Registered: Oct 2012

posted November 19, 2012 11:45 AM

I run big CRT projectors in my garage home theater and they have several cooling fans and can make some noise. Some guys I know build HUSHBOXES for the really big PJs that can sound like hair dryers. A soundproof box with a clear front and some sort of ventilation, usually venting right out of the room. CRT are more permanent installs and ideal mounted on the ceiling, but you might be able to build something for a film projector that had a side panel for changing reels too.

James has a good idea with building a portable sound reducing cart, I'd like to see that article.

I got a spindle assembly and will be fixing my Eumig 810D soon thanks to a fine outstanding member on this forum. I look forward to watching some old films of steam trains that some railroad nut took when they were still in service(1940's?). I'm going to transfer them to DVD and was thinking of recording the sound of the projector running for the silent film DVD transfers.
It will be fun to be able to control the volume of the projector noise while watching the DVDs.

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Ricky Daniels
Jedi Master Film Handler

Posts: 587
From: London & Kent UK
Registered: Jul 2003

posted November 21, 2012 05:14 AM

Hey James,

I did exactly the same once upon a time...

Inspired by sound proof blimps used on studio rear projection fx projectors I made a box just like the one you describe with 16mm spool arms atached to the top and rear to feed Super 8mm into the blimp/through a GS1200 with it's spool arms in the closed position/out to the take-up spool. Also I was able to use large spools for continuous projection of features on the additional spool arms.

I left the lot in the loft of the last apartment I sold, God only knows what the new apartment owners thought it was! [Confused]