After read a lot of posts still without lucky to get the ECM8000 working with my PC
All that i have are the following...
EMC8000
SoundBlaster X-FI
UB802
Multimeter
I have prolbems to calibrate the MIC+UB802
can someone help me?
i try with ARTA and Speaker workshop. both need to configure it in diferent ways.
All that i have are the following...
EMC8000
SoundBlaster X-FI
UB802
Multimeter
I have prolbems to calibrate the MIC+UB802
can someone help me?
i try with ARTA and Speaker workshop. both need to configure it in diferent ways.
If, by calibrate you mean exact dB sound pressure level, I guess it is a little complicated. You probably need a reference SPL meter for that.
The following is how I use ARTA, without considering absolute levels:
Start ARTA and run single frequency or pink noise and adjust the soundcard output and your amp to a suitable sound level. The level being either a subjective suitable acoustic level, or measure the AC at the speaker at eg. 1V or 2,83V (=loud!).
Then set up the mic+preamp. Run calibration, or go direct to Imp, and start the the generator/measurement. Adjust mic preamp and Windows recording volume control so you get a level at about 0 dB, or a little below (to avoid A/D overload).
SveinB.
The following is how I use ARTA, without considering absolute levels:
Start ARTA and run single frequency or pink noise and adjust the soundcard output and your amp to a suitable sound level. The level being either a subjective suitable acoustic level, or measure the AC at the speaker at eg. 1V or 2,83V (=loud!).
Then set up the mic+preamp. Run calibration, or go direct to Imp, and start the the generator/measurement. Adjust mic preamp and Windows recording volume control so you get a level at about 0 dB, or a little below (to avoid A/D overload).
SveinB.
That will be hard to do, even with an SPL meter. Personally I think exact db levels are not nearly as important as relative db levels. So long as you keep the mic a constant distance and voltage, you can compare SPL levels.
Oh yeah, and I couldn't get the calibration to work either. When I pressed the button, there was no sound, so the mic did not record anything.
Dan
Oh yeah, and I couldn't get the calibration to work either. When I pressed the button, there was no sound, so the mic did not record anything.
Dan
How about an "inverse calibration".
Use a speaker with a known SPL at a given frequency at 2.83V.
If we can use 500Hz for the calibration it should fit directly into the ARTA calibration HMI. Then fine-tune by using time-gated measurements to elliminate room influence.
Might be just as good as a cheap SPL meter ???
SveinB.
Use a speaker with a known SPL at a given frequency at 2.83V.
If we can use 500Hz for the calibration it should fit directly into the ARTA calibration HMI. Then fine-tune by using time-gated measurements to elliminate room influence.
Might be just as good as a cheap SPL meter ???
SveinB.
Calibration
Hi samsagaz,
please check the ARTA-compendium in spanish language.
http://www.fesb.hr/~mateljan/arta/AppNotes/ARTA-HB-D2.00 _ES1.pdf
You will find some diy-methods for calibration. Not as reliable as with a 1000$ B&K calibrator but it works.
Regards
Heinrich
Hi samsagaz,
please check the ARTA-compendium in spanish language.
http://www.fesb.hr/~mateljan/arta/AppNotes/ARTA-HB-D2.00 _ES1.pdf
You will find some diy-methods for calibration. Not as reliable as with a 1000$ B&K calibrator but it works.
Regards
Heinrich
.. if you want real (=calibrated) measurements you need professional calibrated equipment.
A cheap soundcard and a cheap microphone is not the right basis for such kind of requirements.
Here you will find whatever is needed:
http://www.sinusmess.de/e/index.htm
As you mentioned: dont take care about the budget
Regards
Heinrich
A cheap soundcard and a cheap microphone is not the right basis for such kind of requirements.
Here you will find whatever is needed:
http://www.sinusmess.de/e/index.htm
As you mentioned: dont take care about the budget
Regards
Heinrich
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