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Behringer ECM800 and its SPL calibration

10K views 6 replies 2 participants last post by  AndreaT 
#1 ·
Hello Folks,

anybody of you has details about the SPL voltage response of a typical ECM 8000 microphone?

I am looking for the ECM 8000 output voltage (at the XLR connector) response vs. SPL input at 1 meter.

In other words, I would like to use the standard ECM 8000 as an SPL meter too.

I don't need any high accuracy, a +/- 3dB accuracy will be even better than needed.

Many thanks in advance to anybody will help me.
Regards,
Andrea.
 
#3 ·
Dear John,

me too did some calculation and from the Standard definition I should get-out the following:
ECM 8000 at 94 dB-SPL @ 1kHz sinusoidal tone shall ouput 1 mV signal.
And at 75 dB-SPL it shalls output 0.112 mV signal

Does this match what you said?
Or, do you see differences?

Thanks a lot for your help!
Kind regards,
Andrea
 
#5 ·
Hello John, I am not so sure you are right. I contacted Behringer (you know it is a German company and they use the formula "Reference: 94 dB-SPL ≡ 1 pascal") and they confirmed me my calculation to be correct.
So, unless the Behringer support was completely sleeping, I am expecting they checked my calculation:
- if the ECM 8000 output 1 mV at 94 dB-SPL
- it should output 19 dB below at 75 dB-SPL, so, 0.112 mV (= 112 uV).

Does it work for you too?
Thanks and regards,
Andrea
 
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