sound - Calculating SPL from voltage output of a microphone with MAX4466 amplifier - Electrical Engineering Stack Exchange
Impedance Measurement Sequence – Dual Channel Method Using Transfer Function - Listen, Inc.
Piezo contact microphone hi-Z amplifier – low noise version – Richard Mudhar
Measuring input impedance and calculating output impedance calculation calculate audio amplifier op-amp how to measure impedance voltage gain total loudspeaker speaker microphone resistance resistor bridging matching test load loudspeaker source ...
amplifier - How does one calculate the input impedance of a tube based preamp? - Electrical Engineering Stack Exchange
A Dynamic Microphone Soundcard Amplifier | audioXpress
Electronics | Free Full-Text | Analysis and Design of a Microphone Preamplifier for Mobile Applications