Silencer Speaker Baffle - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th May 2013, 04:15 PM   #1
diyAudio Member
 
Join Date: May 2013
Location: Perth
Default Silencer Speaker Baffle

I was thinking of gun silencers and wondered if the same idea could be used for speakers to reduce the rear sound. Probably a silly idea but would like to get your thoughts and ideas.
Attached Images
File Type: jpg speaker-silencer-side.jpg (26.2 KB, 523 views)
File Type: jpg speaker-silencer.jpg (20.6 KB, 712 views)
File Type: jpg speaker-.jpg (22.7 KB, 511 views)
  Reply With Quote
Old 28th May 2013, 05:00 PM   #2
49 - for the 18th time - again!
diyAudio Member
 
c2cthomas's Avatar
 
Join Date: Oct 2006
Location: Near "Music City" (Nashville Tennessee)
Hi speakermagic! I love to see people think "out of the box" and come up with new concepts and ideas.

Are you aware of aperiodic speaker enclosure designs? There is a lot of good things to study there. I must confess that I am a bit biased tho because I use an aperiodic design in my speakers.... which are (gasp) omni directional. So - I am really familiar with people throwing things like rotten veggies at me....

aperiodic loudspeaker enclosure design - Google Search
Attached Images
File Type: jpg Mamboni felt disk 3.jpg (194.0 KB, 505 views)
File Type: jpg 2 Mambonied Pioneers 1 Heil and a bunch of SonoTube small px.jpg (94.5 KB, 493 views)
File Type: jpg Walsh5 Remake Dec 2010.jpg (297.3 KB, 164 views)
__________________
DIY audio can be expensive but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"
  Reply With Quote
Old 28th May 2013, 05:23 PM   #3
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Actually a cabinet like that exists. It is the Hartley Boffle.
ACTIVE LOUDSPEAKER SYSTEM: Subwoofer, Construction, Cabinets, Electronic Filter/Tube Crossover, Amplifiers, Units.
  Reply With Quote
Old 28th May 2013, 08:20 PM   #4
diyAudio Member
 
Join Date: Aug 2009
Location: North Texas, USA
There are a variety of lining materials that are effective at mitigating the back wave.

Doesn't need to be aperiodic to do the job.
__________________
I was so much older then, I'm younger than that now.
  Reply With Quote
Old 28th May 2013, 11:01 PM   #5
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Neat idea. I think what you have drawn may actually act more like a series of resonant Helmholtz resonators rather than a gun silencer (which acts more like a muffler for high velocity gases by reducing the differential in the gun's escaping gases by storing the expansion and releasing them sequentially, thereby reducing the sudden gas expansion that accompanies a gun shot's gases. Note that a bullet traveling at supersonic speeds still makes its own sonic boom - so silencers are truly only effective for special sub-sonic cartridges used in movies. In real life - not effective at all with conventioal supersonic ammo.

Anyhow, the tapered spiral (semi-infinite tube) like the B&W Nautilus also aims to achieve this.
  Reply With Quote
Old 28th May 2013, 11:16 PM   #6
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Yes, silencers are effective with super-sonic ammunition. A silencer for, say a .308 sniper rifle is similar in size & shape to an automotive "glasspack" muffler ( One can easily build one with said muffler).
A rifle sound is composed of two elements, the muzzle blast and the "report" of the projectile breaking the sound barrier. The muzzle blast is far louder & can be muffled, the "crack" sound is the projectile. Fortunately the crack sound eminates along the flight path making it difficult to localize, the muzzle blast can be localized.....both are heard well after the projectile finds its mark.


-----------------------------------------------------------Rick..........
  Reply With Quote
Old 29th May 2013, 09:15 AM   #7
diyAudio Member
 
Join Date: Jul 2002
Location: N-W Balkans
As allready mentioned, H. A. Hartley's Boffle:
Attached Files
File Type: zip diy_Boffle.zip (328.6 KB, 97 views)
  Reply With Quote
Old 29th May 2013, 12:05 PM   #8
diyAudio Member
 
Join Date: May 2013
Location: Perth
Thanks for the article on the Hartley Boffle. It was interesting.
  Reply With Quote
Old 31st May 2013, 07:32 AM   #9
diyAudio Member
 
Join Date: Jul 2010
Another thanks for an interesting read. Has anyone here played around with this design?
  Reply With Quote
Old 2nd June 2013, 11:24 AM   #10
diyAudio Member
 
Overkill Audio's Avatar
 
Join Date: Oct 2006
Default Thanks again

Hi Joachim,

Thanks for the link to Hartley.
I love the simplicity of the early audio pioneer's R&D, very focused on sound quality and common sense as well as a solid grounding in the physics and maths.

Today there is such a huge choice of low cost computer / software and sophisticated measurement equipment that some folks get lost in the world of measuring .... Because they can!
They get fixated on a particular technical aspect they can measure to the N'th degree and this eventually leads to the point where their oscilliscope & screens become more important than their ears...

Thanks again for this and all your very valuable contributions, I know I have learned a lot from your good self!

Cheers
Derek.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
NO Baffle 3 way speaker thisisvv Multi-Way 75 31st July 2012 09:37 PM
NO Baffle 3 way speaker thisisvv Full Range 3 7th May 2012 07:10 AM
Chill-Baffle speaker (L-baffle design) fedde Full Range 7 26th September 2010 01:38 PM
Wide baffle 2 way speaker or not Harolda Multi-Way 2 25th May 2010 03:01 AM
Advice: Dog Silencer Modification for enchanced range & intensity boukisan Everything Else 38 12th September 2009 01:01 PM


New To Site? Need Help?

All times are GMT. The time now is 03:47 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2