Infra infrabass for 400 square meters: How? - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 21st December 2009, 07:11 PM   #21
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
I like that shaker device idea. Types for concrete already exist in many forms. I remember when my street got repaved. The roller did such a good job making what felt like a 1.5 earthquake at 15 Hz it broke a water main joint at the intersection.
__________________
Think out of the box
  Reply With Quote
Old 21st December 2009, 11:24 PM   #22
diyAudio Member
 
Join Date: May 2009
Location: Wellington
At Sun City, in South Africa, there is a "Lost World" area. Part of it is crossed via a large bridge mounted on flexible supports. Periodically it simulates an earthquake. The bridge shakes horizontally at 2 or 3 Hz, courtesy of motor driven drivers - you can feel them spin up and slow down. At the same time, LF rumblings are generated by big subs mounted in concealed enclosures along the sides of the bridge. Finally, higher frequency components are provided by stacks of JBL cabinets in imitation caves near the bridge.

If I were going to generate "infrabass" acoustically, I'd use multiple large high excursion drivers in enclosures with a sharply peaked resonance at, say, 8 Hz. So rather than a smooth response, they would have an "organ pipe" resonance. Feeding them with LF noise rather than a steady tone would produce a quasi-earthquake effect.
  Reply With Quote
Old 22nd December 2009, 10:19 AM   #23
Andreas is offline Andreas  Denmark
diyAudio Member
 
Join Date: Sep 2003
Location: Denmark
The most violent infrabass I have experienced was made by a crane mounted machine that vibrated iron plates into soil for building foundations. the individual plates where 6 m long x1 m wide and probably 10-15mm thick Effectively it made the whole adjacent concrete building vibrate to an extent where I hade a 12kg heavy balance dancing around on the table.
I cannot find the english word for the contraption but here is a picture.
http://www.arkil.dk/Default.aspx?ID=273

Regards
Andreas
  Reply With Quote
Old 27th December 2009, 12:28 AM   #24
Ron E is offline Ron E  United States
diyAudio Member
 
Ron E's Avatar
 
Join Date: Jun 2002
Location: USA, MN
Quote:
Originally Posted by Andreas View Post
I cannot find the english word for the contraption but here is a picture.
Vibrationsteknik
Pile Driver
Pile driver - Wikipedia, the free encyclopedia

These are used to reduce noise, otherwise they often use a device that runs on fuel and is basically a 2-cycle "reaction engine" that slides on a rod that has a piston attached to it, when combustion occurs, it throws the "engine" up again. Every explosion drives the pile in a bit further.
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. Aldous Huxley
  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
Graham Holliman Velocity Coupled Infra Bass Speaker? Neopsp Subwoofers 412 29th July 2013 02:49 AM
any 1 eva tryed using 'phones + sub for infra? Helix Everything Else 5 7th July 2011 11:13 PM
VU Meters Weston Tubes / Valves 15 3rd August 2008 12:45 AM
infra-red detectors pfcs49 Parts 6 7th March 2008 04:07 AM
Remote control fo creative infra 18X ?? hannes86 Digital Source 2 12th November 2004 05:14 AM


New To Site? Need Help?

All times are GMT. The time now is 01:58 PM.


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