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Feb 4, 2016 at 19:02 comment added Andy aka Did you resolve all your issues on this @user3892683
Nov 3, 2015 at 13:45 comment added Andy aka The mike spec is -41 dBV for a SPL of 94 dB. If output volts drop by 4.3 dB to -45.3 dBV then this is because the SPL has dropped by 4.3 dB to 89.7 dB SPL.
Nov 3, 2015 at 13:31 comment added user90392 And when the dBV is -45.3 then the decibels are 94-(45.3-41) =90 decibels correct?
Nov 2, 2015 at 8:20 comment added Andy aka 5.4mV is -45.3 dBV. Think about it... 1V = 0 dBV, 0.1V is -20 dBV and 0.01V (10mV) is -40 dBV. 5.4mV in dB form is 20*log(5.4E-3).
Nov 2, 2015 at 7:30 comment added user90392 When assuming that it is linear
Nov 2, 2015 at 6:30 comment added user90392 Ok, and if I want to know the decibels for 5.4 mV -> 20log(0.0054/0.0089)=-4.3 dB , correct?
Nov 1, 2015 at 21:52 comment added Andy aka -41 divided by 20 = -2.05. Then take the antilog = 8.9mV. The ratio of voltages in dB terms is 20log10(V1/V2) so I just did the reverse. 0 dBV = 1V RMS.
Nov 1, 2015 at 21:29 comment added user90392 How do you get from -41 dB to 8.9mV?
Nov 1, 2015 at 20:32 history answered Andy aka CC BY-SA 3.0