HOLMImpulse: Measuring Frequency- & Impulse-Response - Page 39 - diyAudio
Go Back   Home > Forums > Design & Build > Software Tools

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

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 25th August 2009, 09:34 PM   #381
diyAudio Member
 
Join Date: Sep 2008
Well there is not really 'anything' to learn as HOLMImpulse is a very easy program to setup and use. I suggest you give it a try. For the ease of comparing measurements if nothing else.
Did I mention it was easy to use?

ARTA is not a bad program and does a lot more than HOLM does at the moment. But for measurements and ease of use HOLM wins.
IMHO that is.


"There is no such thing as an impedance impulse, because the impedance is strictly a frequency domain concept."

If I put it this way. Is there a practical way to remove the signal going into the speaker and effectively using it as a "mic" by looking at the back EMF or other signals generated. Getting time domain info like any mic would.
Backwave, internal resonance, pipe resonances and other type of effects seen by the cone should show up.
The biggest problem now would be the speaker actually acting like a big mic picking up a lot of noise. Especially LF.
So removing that part would not be easy. Although a long or multiple sweeps might fix that.

Not sure if it is of any use when it comes to the concept of HOLMImpulse buy I just can't get it out of my head.
  Reply With Quote
Old 25th August 2009, 09:40 PM   #382
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Hey Patrick I use the Dayton WT3 and Arta. Arta is very nice, but I found HOMImpulse easier to master. Not sure why. Of course you can export to Arta if you need further charting (I do).

HOLMIpulse is easy to lean and use. And it's free. I like being able to save the files - unlike the free version of Arta.
  Reply With Quote
Old 26th August 2009, 03:06 AM   #383
tresch is offline tresch  United States
diyAudio Member
 
Join Date: Dec 2008
I've been trying for days to get a decent measurement out of speaker workshop.. finally downloaded HOLMImpulse and I think I'm finally looking at reasonable numbers for the first time. This is a lifesaver! Crossover design here I come!

Also, I was posting about my problem in the Software Tools forum, which is new, and is a little barren. This thread would be perfect for that forum. Perhaps an admin can move it over?
  Reply With Quote
Old 26th August 2009, 05:22 AM   #384
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I agree - it would be nice to move it there. Perfect place for it.
  Reply With Quote
Old 26th August 2009, 07:07 AM   #385
diyAudio Member
 
Join Date: Mar 2003
Location: Denmark, Copenhagen
I also agree - Personally I use HOLMIMpulse for a lot besides multiway:

* Electrical measurements
* Soundcard validation
* Fullrange systems
* General validation of the relation between Impulse <-> Frequency

I also started the thread HOLMImpulse: Measurements in practice so that measurements of loudspeakers in general could be and that thread.

Bugs, feature requests, technical discussions should be in this thread

I'll think about it and contact a moderator
__________________
Follow your first Impulse with HOLMImpulse
  Reply With Quote
Old 26th August 2009, 10:13 AM   #386
diyAudio Member
 
Join Date: Mar 2003
Location: Denmark, Copenhagen
Default Bug fix new version 1.3.0.2

Version 1.3.0.2 (2009-08-26)

Bugfixes:
* Application version 1.2.9.9 instead of 1.3.0.0
* NDEBUG not defined for compiler causing slower performance

Sorry...
__________________
Follow your first Impulse with HOLMImpulse
  Reply With Quote
Old 26th August 2009, 10:38 AM   #387
diyAudio Member
 
john k...'s Avatar
 
Join Date: Aug 2004
Location: US
[QUOTE=David_Web;1906938]


"..... impedance is strictly a frequency domain concept."


[QUOTE]


Just browsing this thread. I don't know where the above quote was initiated but it is not entirely correct. Impedance is defined for any wave form that can be expressed by an exponential such as V = Vo exp(st), I = Io exp(st), s = a +jb. This leads to the well known relationships,

Zr = R,

Zc = 1/(sC)

and ZL= sL

s need not be limited to s = jw.
__________________
John k.... Music and Design NaO Dipole Loudspeakers.
  Reply With Quote
Old 26th August 2009, 01:44 PM   #388
diyAudio Member
 
Join Date: Mar 2003
Location: Denmark, Copenhagen
Default HOLMImpulse > ARTA

What I find very smart in HOLMImpulse, is that you have 50 measurements in a collection where you can compare up to 3 at the same time
In ARTA you can only compare two impulse-response in the same graph using overlays.

With the new fileformat it is very easy to import the recorded impulse responses to ARTA:

1. HOLMImpulse > File > Save Measurements (WAV)
(This will create a zip-file with all the measurments)

2. Unzip the measurement wave-file you want to import in ARTA

3. ARTA > File > Import .Wav file. Now make eg. your CSD etc.. Which I have not yet implemented in HOLMImpulse
__________________
Follow your first Impulse with HOLMImpulse
  Reply With Quote
Old 26th August 2009, 01:55 PM   #389
soongsc is offline soongsc  Taiwan
diyAudio Member
 
soongsc's Avatar
 
Join Date: Mar 2005
Location: Taiwan
Interesting progress. I'll try it out again some time.
__________________
Hear the real thing!
  Reply With Quote
Old 27th August 2009, 09:50 PM   #390
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Default multi-pass

New version seems to work great. The file saving in FLAC or WAV is nice.
Keeping response uscaled by default is also good.

One thing that went away. The average of multiple passes. Can we have it back please? I always used 3 or 4 passes for my speaker measurements.
  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
Measuring Frequency Response MCPete Multi-Way 10 10th February 2009 12:36 AM
Measuring Frequency Response furly Planars & Exotics 1 17th March 2006 06:59 AM
Measuring the frequency response of a mic? mr_push_pull Multi-Way 5 30th August 2004 12:26 PM


New To Site? Need Help?

All times are GMT. The time now is 03:16 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