Slightly struggling to find the right technical language to frame my question, but let me try...

  • A dynamic microphone is effectively an electrical generator, similar to an alternator.
  • I've read that adding a high electrical load to (drawing higher current from) an alternator creates a higher magnetic drag or counter torque on the rotor, which makes sense intuitively, since it's doing more work.
  • So...does the same thing happen with the coil of a dynamic microphone if we treat at as a power source instead of a measurement device?
  • Is this the reason that, instead of impedance-matching the pre-amplifer for maximum power transfer, we use impedance bridging (i.e. very high load/imput impedance in the ampl for drawing minimum current, relative to a low microphone impedance)? Would drawing too much current cause some kind of magnetic damping in the voice coil, thus preventing perfect sound capture?
  • $\begingroup$ EE stack exchange $\endgroup$
    – Tiger Guy
    Commented Oct 17, 2022 at 23:51
  • $\begingroup$ @TigerGuy Thanks, posted it there. $\endgroup$ Commented Oct 18, 2022 at 7:37


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.