CAlbertson
Member
I assume one measures the output impedance of a microphone by assuming the mic is a perfect AC voltage source in series with an unknown value resister. The goal is to measure that resister. The simplest way I can think of is to place a variable resister in series with the mic and adjust it until the voltage is exactly half of what is was. The impedance is whatever the resister is set to.
Now assuming the above is how it's done. I'd would need a source of sound for the mic and of course phantom power if the mic needs that. What is are people using for a sound source and is there a "standard" audio frequency for measuring impedance?
Same question about measuring frequency response. Making noise from 20Hz to 20KH is not easy if you need to control the volume to (say) 0.1db. Should I try using an un controlled source like a home HiFi speaker connected to an signal generator and then pair my microphone under test with a calibrated mic? Again what are people here using?
Now assuming the above is how it's done. I'd would need a source of sound for the mic and of course phantom power if the mic needs that. What is are people using for a sound source and is there a "standard" audio frequency for measuring impedance?
Same question about measuring frequency response. Making noise from 20Hz to 20KH is not easy if you need to control the volume to (say) 0.1db. Should I try using an un controlled source like a home HiFi speaker connected to an signal generator and then pair my microphone under test with a calibrated mic? Again what are people here using?