On Wednesday 02 December 2015 05:15:29 andy pugh wrote: > On 2 December 2015 at 02:27, Gene Heskett <[email protected]> wrote: > > As a broadcaster, if we wanted a dead room, we lined it with > > sonotex. Grey open cell foam that looks like it was molded in an egg > > carton. Next best thing to an anechoic chamber. > > I think that is a slightly different application though, killing > echoes rather than blocking sound.
It also does an excellent job of killing wall conducted external noise coming in. So quiet in there that you really could hear yourself think. I think the only thing I could identify as to the source of anything I could hear in there, was a chest freezer sized IBM printer, an old pin pounder that I finally had to relocate so it was over a wall in the upstairs room it was in because the head assembly weighed about 30 lbs, and sweeping back and forth 18" about 1.5x a second when it was doing logs was loosening the nails in the drywall because it was carrying the whole floor about 1/16". It came with a 360 system we'd bought for traffic at Columbine's direction. Hell for stout but its pins were big & dull. I made the girls type up new copies of my W2's every year because the first carbon was hard to read, the bottom one only a smudge or two. Very dependable, but the poorest printer in terms of output I ever saw. Guys in the control room too often had to just guess what commercial to play because they couldn't read the green line log. > (In the case of the equipment box, you don't care if the noise gets > bounced back to the noisy machine, as long as it stays in the box) Me either. I may, since I'm out of the button carving business till more mills arrive, see about doing something about it, or I could start assembling the base parts, or work on the lids as I've not got all the breadboard ends permanently attached yet. Lids seem like the most easily approached thing. And I need to unhook the big vac from the saw and do some floor patrol, mahogany sawdust all over because when I started, I was keeping the mill clean with an air hose. I'd about half the machine work done before I hooked up a 2nd BOB to the 5i25 and built an interface to control the vac with M8-M9 in the code. Which reminds me, I promised some pix, so I have 4 other things to do. The other day, when I said there was about 1/5-2" of dust in the bucket? When I dumped it later that day, it was closer to 6" deep, so its doing a pretty decent job. This ebony dust is more like fine sand and its pretty dense stuff so I'd imagine its getting 99+% of that. If I'd get off my duff, I should make another one, and rig it off the back of the chop saw as its catch bag only gets about half & needs dumped a couple times a day when its busy. An active vacuum should improve the catch ratio. I have a 20" box fan, with a 20" filter on the back, hanging on the overhead door track, but the last filter I put on is a glass mat, not near as effective as the pleated paper "hepa" filters. So I need to get another 6 pack of those too. I've half a sheet of 3/8" ply that could be repurposed, and a trip to Lowes to see what they have for sound absorber wall coverings. Or visit their web page. But neither Lowes, nor H-D show anything thats the least affordable. 4x8' panels well over a $100 bill ea. 15.5"x48" unfaced wall bats, $57 each? Good grief! Rug scraps anybody? Not fireproof though, none of that crap is. So the day shouldn't be a total waste, if I can get my wanna cramp legs to work. First I'll see about those pix. Stay tuned. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
