AKG D190 ES calibration - diyAudio
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Old 23rd January 2011, 07:27 PM   #1
Mikelo is offline Mikelo  Antarctica
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Default AKG D190 ES calibration

I have an AKG D190ES that comes with a frequency response graph. Does it make sense to have this mic calibrated for speaker testing?

Also, what if I use the curve to make a .cal file. I see that the .cal files are nothing more ordered pairs of frequencies and levels. Would that be better than no calibration file?
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Old 24th January 2011, 07:26 AM   #2
oshifis is offline oshifis  Hungary
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This is a dynamic cardioid mic. You need an electret omni IMHO.
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Old 24th January 2011, 07:39 AM   #3
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Quote:
Originally Posted by oshifis View Post
This is a dynamic cardioid mic. You need an electret omni IMHO.
Why an electret vs dynamic? Or is it the omni vs cardioid?

G
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Old 24th January 2011, 01:52 PM   #4
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Omnis, due to their construction, have a more linear frequency response and polar pattern than uni-directional mics. Condenser or electrets have a flatter response than dynamics and can be made extremely small (with excellent repeatability) to put into a long thin wand which minimizes the interfereance of the measuremic body to the signal to be measured. E
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Old 25th January 2011, 05:18 AM   #5
Mikelo is offline Mikelo  Antarctica
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Thank you ... Another problem I found out is that a dynamic mic, even when flat, has a stronger 'proximity effect' in the bass response changes dramatically with distance from the source. Also, recording mics roll off below 100 Hz and this one begins to roll off at 200.
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Old 25th January 2011, 01:11 PM   #6
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The proximity effect is found on uni-directional (cardoid) mics, that is why crooners like it. Omnis do not have it. E
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Old 25th January 2011, 01:30 PM   #7
Pano is online now Pano  United States
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Unless you are measuring very close, the proximity effect won't matter. The big problem is the 10dB roll-off at both ends.
Bottom line, you'd be better off going to Parts Express and getting on of their measurement mics. You will need phantom power.
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