Quick nooby questions - 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 1st October 2007, 08:33 PM   #1
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default Quick nooby questions

Hi All,

1. Can anyone confirm/deny that Unibox models an anechoic response?

2. Is it correct to assume that Unibox ignores baffle step correction?

3. With respect to baffle step correction, I've heard refence to 2pi and 4pi radiation patterns. Last I checked 2pi radians = 360 degrees, which is a full circle. What do 2pi and 4pi refer to? My guess would be volume, but in what way I do not know.

Thanks!
  Reply With Quote
Old 1st October 2007, 09:07 PM   #2
Svante is offline Svante  Sweden
diyAudio Member
 
Svante's Avatar
 
Join Date: Feb 2004
Location: Stockholm
Default Re: Quick nooby questions

Quote:
Originally posted by weinstro
Hi All,

1. Can anyone confirm/deny that Unibox models an anechoic response?

2. Is it correct to assume that Unibox ignores baffle step correction?

3. With respect to baffle step correction, I've heard refence to 2pi and 4pi radiation patterns. Last I checked 2pi radians = 360 degrees, which is a full circle. What do 2pi and 4pi refer to? My guess would be volume, but in what way I do not know.

Thanks!
Now I'm no expert on Unibox, but I think it models anechoic response and that there is no baffle step. I might be wrong.

The 2 pi and 4 pi are angular space (is that the proper english word?). It corresponds to the area of the part of the sphere at a unit distance. Full space corresponds to a the area of a sphere with the radius 1, ie 4 pi. A half sphere has the area 2 pi, etc.
__________________
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  Reply With Quote
Old 1st October 2007, 10:26 PM   #3
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default Re: Re: Quick nooby questions

Quote:

Now I'm no expert on Unibox, but I think it models anechoic response and that there is no baffle step. I might be wrong.
Me, too.

Quote:
The 2 pi and 4 pi are angular space (is that the proper english word?). It corresponds to the area of the part of the sphere at a unit distance. Full space corresponds to a the area of a sphere with the radius 1, ie 4 pi. A half sphere has the area 2 pi, etc.
Does area = surface area, in this context?

Thanks!
  Reply With Quote
Old 2nd October 2007, 06:10 AM   #4
Svante is offline Svante  Sweden
diyAudio Member
 
Svante's Avatar
 
Join Date: Feb 2004
Location: Stockholm
Default Re: Re: Re: Quick nooby questions

Quote:
Originally posted by weinstro

Does area = surface area, in this context?
Yes, the surface area of the part of the sphere at unit distance from the origin that is exposed to sound.

"Solid angle" is the english word for it, it suddenly occured to me.

http://en.wikipedia.org/wiki/Solid_angle
__________________
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  Reply With Quote
Old 2nd October 2007, 05:43 PM   #5
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

I'm no expert on Unibox either but all bass end only software
I've seen ignores baffle step but gives output into 2pi not 4pi.
That is a 90dB driver is not reduced to 84dB due to 4pi loading.

/sreten.
  Reply With Quote
Old 3rd October 2007, 05:56 AM   #6
Svante is offline Svante  Sweden
diyAudio Member
 
Svante's Avatar
 
Join Date: Feb 2004
Location: Stockholm
Quote:
Originally posted by sreten
I'm no expert on Unibox either but all bass end only software
I've seen ignores baffle step
Hehe, isn't that more or less the definition of "bass end only"?

Click the image to open in full size.

...sorry, I could not help myself.
__________________
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  Reply With Quote
Old 3rd October 2007, 06:41 AM   #7
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Thanks for the insights, guys!
  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
2 quick SI questions Decker Class D 2 26th November 2007 11:30 PM
Nooby speaker design questions weinstro Multi-Way 5 27th September 2007 11:11 PM
2 quick questions JPeitzman Chip Amps 7 22nd July 2007 05:27 PM
2 quick questions Lowjacker Car Audio 3 8th July 2006 03:32 AM
quick questions theChris Multi-Way 0 12th February 2003 04:54 AM


New To Site? Need Help?

All times are GMT. The time now is 07:36 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