A bit of googling turns up that the '-60 dB' figure on the ECM datasheet should read -60 dBV/uBar = 10 mV/Pa. An example cal sheet for one had 8.2 mV/Pa.
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?
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
94 dB SPL is 1 Pa, but the stated nominal sensitivity of the ECM8000 is 10 mV/Pa, which would mean 10 mV at 94 dB and 1.12 mV at 75dB. This sample calibration sheet from IBF Acoustic shows 8.2 mV/Pa sensitivity.
Thank you John, so the Behringer support told me the false.
Regards, Andrea
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