Slight OT: Diffuser Calculator Software - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 2nd March 2011, 09:11 PM   #1
diyAudio Member
 
Join Date: Jun 2007
Default Slight OT: Diffuser Calculator Software

I know this is the loudspeaker forum, but I'm also not sure where else I can find a resource as deep and rich at that of this group.

I admit my question is off topic, but I assume if anyone knows, you guys will.

In my past wanderings on Internet, I remember coming across some software that will help calculate diffusion panels. Though I don't remember if it was an On-Line Caculator or some Downloadable Software.

Does this sound familiar to anyone, and can you direct me do some resources?


Second, there is a program that will test a room for reflections and standing waves, and so forth. I know this is a free downloadable program, and if anyone could give me the name I would appreciate it.

Sorry for the distraction, and thanks for whatever help you can give me.

Steve/bluewizard

Last edited by BlueWizard; 2nd March 2011 at 09:14 PM.
  Reply With Quote
Old 2nd March 2011, 10:36 PM   #2
diyAudio Member
 
Ferrit37's Avatar
 
Join Date: Apr 2007
Try QRdude

QRDude: Quadratic Residue Diffuser calculator
__________________
Warmest regards,
Ferrit37
  Reply With Quote
Old 3rd March 2011, 05:50 AM   #3
dewardh is offline dewardh  United States
diyAudio Member
 
Join Date: Dec 2005
Location: Berkeley, CA
Or, if you want to do a PRD (skyline) there's

Calculate a Two-Dimensional Primitive Root Diffuser

and a handy prime checker (which you'll need)

Prime Number Calculator
  Reply With Quote
Old 3rd March 2011, 06:22 AM   #4
benb is offline benb  United States
diyAudio Member
 
Join Date: Apr 2010
This is slightly OT to what you asked (though it's arguable that a rectangular room has nodes and standing waves just as does a rectangular speaker cabinet, the main difference being the frequencies involved - and BOTH the cabinet and the room are important to good sound reproduction!), but...

This book "The Master Handbook of Acoustics discusses how to calculate rectangular room resonances and how to calculate a diffuser, as well as many other good thing you may want to know:
I bought this book in the 3rd edition, that was of course just before the 4th came out:
Amazon.com: Master Handbook of Acoustics (9780071360975): F. Alton Everest: Books

Also, I do recall ten years ago downloading a spreadsheet that calculates the node frequencies of a room given its dimensions. I have no idea where that would be online, but I'd think there would be several of those online now.
  Reply With Quote
Old 3rd March 2011, 07:14 AM   #5
diyAudio Member
 
Join Date: Jun 2007
Thanks everyone, that's all good information.

I found a copy of the Master Handbook of Acoustics for $24 in paperback; that's not too bad.

If any one has other informtion, it is certainly appreciated.

Steve/bluewizard
  Reply With Quote
Old 3rd March 2011, 07:46 AM   #6
dewardh is offline dewardh  United States
diyAudio Member
 
Join Date: Dec 2005
Location: Berkeley, CA
Here's a primitive root calculator (for use with the prd calculator)

Section 11.4: Quadratic Residues and Primitive Roots

and for a "how to" read Lupo's posts in this thread

BBC PRD Repetition--am I allowed? - Gearslutz.com
  Reply With Quote
Old 3rd March 2011, 07:25 PM   #7
diyAudio Member
 
Join Date: Jun 2007
Dewardh.

That link to GearSlutz was in valuable. One of the posters take you completely through the design process. It is still not crystal clear, but if is far far far more clear than it was.

Thanks again to all.

Steve/bluewizard
  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
Using a diffuser cone for up-firing speakers tspringer99 Multi-Way 19 23rd July 2014 03:04 AM
Diffuser on NS-1000 phillfyspoon Multi-Way 9 28th May 2010 09:27 AM
skyline diffuser calculation rabarbarusa Everything Else 0 6th October 2008 10:45 PM
Cheap Absorber/Diffuser LineArray Full Range 6 16th August 2008 01:19 AM
OT: Web Publishing Software kneadle Multi-Way 10 1st November 2004 09:25 PM


New To Site? Need Help?

All times are GMT. The time now is 05:47 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