Armory Sponsor
Posted: 5/21/2006 5:52:33 PM EDT
|
I recently sold my house (including full range facilities) and will be building shortly in a neighborhood (shooting not specifically excluded, but unsuppressed definitely out of the question). I'm looking for options to disguise/reduce the sound of firearm discharge on my new property in addition to suppressors. My 5+ acre lot backs up to a huge hill and everyone builds in the front of their lot (I'll be ~1000' from nearest house). I legally own several suppressors - I am looking for ideas and designs to legally further reduce the noise from a rifle or carbine.... I've come up with a design for a "shed" made of concrete and a garage door that can be raised to shoot out of. I'm doing research on any designs (and legalities) of structures or emplacements designed to reduce or disguise the sound of a rifle discharge, and would appreciate your input. Here's the best link I've found so far about sound suppression (with some awesome links, by the way): matrix.dumpshock.com/raygun/basics/suppress.html. I seem to remember a post about someone who used a 55-gallon drum with baffles to further reduce sound. It would seem like there should be a lot of experience from the music industry and industrial applications at reducing sound that would be applicable here. Has anyone looked at fixed building or dampening controls to workin this space? Any ideas would be greatly apprecaited. Black Fox |
|
Thanks for the reply, parshooter. That's an idea I hadn't heard before. So here's my theory - there are 5 basic options available to reduce noise: (1) reduce at the origin (suppressed, subsonic ideal, possibly use "tire tube" or other technology) (2) locally contain and/or direct (partially enclosed building and/or berms or barriers) (3) absorb (foam on walls, hanging from ceiling, etc.) (4) diffuse (distance, dense materials like plants near source) (5) actively cancel or shift (active noise control, frequency shifting or destructive interference using resonance chambers or something similar) Seemingly, the best results will be obtained by using these methods in conjunction with each other. Just as an FYI, here are some more links with information about the topic: A Finnish study on the effects of suppressors and other noise-dampening technologies: www.guns.connect.fi/rs/suppress.html Lots of good info in here - particularly when lobbying to get suppressors from your CLEO? An interesting article on car mufflers that has some carry-through lessons: auto.howstuffworks.com/muffler.htm destructive interference is something I'd definitely like to learn more about - particularly frequency shifting or attenuation. A good website on active noise cancellation: users.erols.com/ruckman/ancfaq.html The only way I think it could be used effectively for shooting is in a partially enclosed space, sized appropriately for the frequency of the noise being dampened. By the way, I have no idea if this is the right forum or not. It seemed like the only place to talk about suppressors and other suppression options, but feel free to point me in a different direction if appropriate!! I will probably begin some experiments in this arena, so let me know if there's interest and I'll post results. Black Fox |
|
One of the military (Md. Guard at Gun Powder) ranges near $1,000,000. houses used this: 24 inch concrete tiles, sprayed on the inside with cellulose. from the parking lot to the range (250 m) you couldn't tell the direction of fire. It sounded like a 9mm Mac can on a M16. Add some trees and dirt, start shooting  ATB |
Please do post the results. Interesting info, and I may be in a similar situation in a few months. Saw your wall pics in the DIY forum. That's the old place, correct? Either way, hanging tires in the backyard probably won't work for you.  Check out the M16 forum here for more suppressor/full-auto discussion. Clicky here. |
Armory Sponsor