adc_ac = adc_reading - bias_levelvolts = (5.0 / 1024.0) * adc_acvolts_db(peak) = -20.0 * log10(volts)spl_db(peak) = volts_db + 6
for i in 1 to 100 capture_ac = adc_reading - bias_level sumSquare += capture_ac * capture_acrms = sqrt(sumSquare / 100)
The microphone is -46dB (V/Pa)The op-amp stage gain is stated as 100, which is +40dBThis gives a system sensitivity of: -46+40 = -6dB
stage gain is now 60 and not 100. What does it mean for dB? Is it now +24dB?