Hi there, All you SPL freaks and SQ lovers here's something that will help you analyse and tweak your Car audio system for optimum performance..
I have prepared many test tones , single sine waves from 20Hz to 20000Hz. I also have prepared a few warbles, overlaps and sweeps.
If anyone is interested , please let me know what you want and i can either mail them to u, or if someone knows where i can post them up for free downloads i wud not mind doing that either,,
Hope this helps...
Victor...
Replies (4)
cybersailor420 on 10/6/2005 18:03:43
http://www.nch.com.au/tonegen/
this is what i use. when your demo time runs out, just delete it and redownload it.
-Ian-
Victor on 10/6/2005 18:07:08
yes that is a good program, and give you lots of options too..
these are the one i use, much more advanced and with many many more options , but one shud know a bit of math to use this one,
http://www.download.com/Expression-Tone-Generator/3000-2170_4-10100943.html
&
http://www.download.com/Test-Tone-Generator/3000-2169_4-10418433.html
Victor..
swez on 10/7/2005 06:40:35
Also, do you have a pink noise reference tone? That is a great way to set up high SQ systems. Works best if you have at least 30 seconds of that set up tool. An RTA (and calibrated mike) are best used here. One often needs a good EQ to dial down the mids and bring up the lows and highs. The goal is to get as flat of a response curve as possible in the cabin of the vehicle.
Once we have a "flat" response curve as a reference, then we can tweak the EQ settings for best listening curves on the music we listen to most.
Note: The trick on using EQ properly is to bring down (attenuate) the "hot spots" in the midrange area and take out any boominess detected in MB or upper bass ranges. (perhaps remove some shrill highs from metal dome tweeters too) To get this right, we cut the hot spots and use minimal boost (a few dB is all) to balance out the response curve. (usually a few dB of bass boost and some in the upper mids & tweets)
Swez
Victor on 10/7/2005 06:47:53
all these programs have pink noise ( mono) & out of phase pink noise as well as white noise..
for those of you who are wondering what are these pink and white noises,,, have a look here
http://www.epanorama.net/documents/audio/noisetypes.html
http://hyperphysics.phy-astr.gsu.edu/hbase/audio/equal.html
Hope that helps...
Victor..
I have prepared many test tones , single sine waves from 20Hz to 20000Hz. I also have prepared a few warbles, overlaps and sweeps.
If anyone is interested , please let me know what you want and i can either mail them to u, or if someone knows where i can post them up for free downloads i wud not mind doing that either,,
Hope this helps...
Victor...
Replies (4)
cybersailor420 on 10/6/2005 18:03:43
http://www.nch.com.au/tonegen/
this is what i use. when your demo time runs out, just delete it and redownload it.
-Ian-
Victor on 10/6/2005 18:07:08
yes that is a good program, and give you lots of options too..
these are the one i use, much more advanced and with many many more options , but one shud know a bit of math to use this one,
http://www.download.com/Expression-Tone-Generator/3000-2170_4-10100943.html
&
http://www.download.com/Test-Tone-Generator/3000-2169_4-10418433.html
Victor..
swez on 10/7/2005 06:40:35
Also, do you have a pink noise reference tone? That is a great way to set up high SQ systems. Works best if you have at least 30 seconds of that set up tool. An RTA (and calibrated mike) are best used here. One often needs a good EQ to dial down the mids and bring up the lows and highs. The goal is to get as flat of a response curve as possible in the cabin of the vehicle.
Once we have a "flat" response curve as a reference, then we can tweak the EQ settings for best listening curves on the music we listen to most.
Note: The trick on using EQ properly is to bring down (attenuate) the "hot spots" in the midrange area and take out any boominess detected in MB or upper bass ranges. (perhaps remove some shrill highs from metal dome tweeters too) To get this right, we cut the hot spots and use minimal boost (a few dB is all) to balance out the response curve. (usually a few dB of bass boost and some in the upper mids & tweets)
Swez
Victor on 10/7/2005 06:47:53
all these programs have pink noise ( mono) & out of phase pink noise as well as white noise..
for those of you who are wondering what are these pink and white noises,,, have a look here
http://www.epanorama.net/documents/audio/noisetypes.html
http://hyperphysics.phy-astr.gsu.edu/hbase/audio/equal.html
Hope that helps...
Victor..
Copyright ClubKnowledge 2009 * All Rights Reserved
