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Dyno cell noise cancellation

Posted: Wed May 04, 2016 10:59 am
by Tom Cannon
Is it possible to make 8000 rpm whisper quiet?

I own a building that was a Bakery. One of the basements has a room that the boiler was in. To me it looks like a built in dyno cell, would be perfect really. I wouldn't want to get the neighbors upset with me. Anyone have any experience with this?

Re: Dyno cell noise cancellation

Posted: Thu May 12, 2016 5:59 pm
by Sir Yun
https://drive.google.com/file/d/0B_l73G ... ef=2&pli=1

while not about dyno cells the basic principles do apply.

Re: Dyno cell noise cancellation

Posted: Fri Jul 22, 2016 8:55 am
by Rick Finsta
I'm going to generalize here, because I'm far from an expert...

The thing to remember is that you can isolate, or you can absorb, or you can do a little of both.

The problem with isolation is it is design intensive - things like floating floors and walls that are very heavy and isolated from contact with each other and other structures. Room-inside-a-room stuff often using special materials and fasteners/adhesives.

The problem with absorption is it that it is frequency-dependent and the lower the frequency, the harder it is to absorb. Also, special materials are involved and they aren't cheap.

If you are interested, go to recording studio forums and read up. I've got a studio but I only needed to absorb to stop reflections causing listening issues at the mixing position so that's nothing like trying to stop noise from escaping the space. Honestly, starting in a basement is a pretty good first step there, since you don't care about noise coming IN.

Re: Dyno cell noise cancellation

Posted: Fri Aug 05, 2016 12:52 am
by JoePorting
I wouldn't think this would be a big deal since a dyno run is usually only about 3 or 4 minutes long, with the actual WOT dyno run only lasting 5 seconds or so.

Re: Dyno cell noise cancellation

Posted: Sun Nov 13, 2016 5:39 pm
by MadBill
However short-lived, the bellow of open headers is not music to everyone's ears. Many years back we were tuning my pal's 1600 cc Formula Ford in my driveway, checking for spark retard at 6,000 RPM. When we shut it down, we realized that a neighbor had been screaming himself hoarse all the while, telling us to shut that <%$@# thing off! :roll:

Re: Dyno cell noise cancellation

Posted: Fri Jul 07, 2017 12:35 pm
by j-c-c
Rick Finsta wrote:I'm going to generalize here, because I'm far from an expert...

The thing to remember is that you can isolate, or you can absorb, or you can do a little of both.

The problem with isolation is it is design intensive - things like floating floors and walls that are very heavy and isolated from contact with each other and other structures. Room-inside-a-room stuff often using special materials and fasteners/adhesives.

The problem with absorption is it that it is frequency-dependent and the lower the frequency, the harder it is to absorb. Also, special materials are involved and they aren't cheap.

If you are interested, go to recording studio forums and read up. I've got a studio but I only needed to absorb to stop reflections causing listening issues at the mixing position so that's nothing like trying to stop noise from escaping the space. Honestly, starting in a basement is a pretty good first step there, since you don't care about noise coming IN.
I think you greatly understated your grasp of this issue :D

Re: Dyno cell noise cancellation

Posted: Fri Jul 07, 2017 7:03 pm
by miniv8
Look up your local egg farmer, and purchase a pallet of egg-trays to cover some of the walls and ceiling.