Transformers and love

2 coils of wire hugging each other.






In audio engineering usually the output of a microphone is connected to one such winding called primary and we take the voltage amplified music signal from the other winding called the secondary.
Transformers are the equivalent to for example 2 bike gears joined by a chain. Force is increased and velocity is decreased. In electronics voltage is increased, current is decreased. So that power ie VxI or
Fxu in the bike case remains the same. The principle of conservation of energy. The varying voltage represents the waveform of the music signal. Similarly the varying current. Electron music dance.


From music producer's brain to listener's brain there may be quite a few such signal transformers in the signal path and usually they sound more than great. There are many reasons known of unknown, some of them are summarized in older posts


A song example:


When I Fall in Love - Nat King Cole


One reason why transformers?


They help maintain flat frequency response from artist's brain to listener's brain [Lowe, Morgan] by creating unflat frequency response from microphone to loudspeaker.
So reproduction sounds less bass heavy and less high frequency heavy.
Fourier theorem or Fourier transform must be taken from artist's brain to listener's brain rather than just mic to loudspeaker. (The frequency response of our brain for example depends on intensity).
The above just not be interpreted that transformers have a limited bandwidth. They can go easily to hundreds of kilohertz. But if bass heaviness for example is needed to be taken care off, suitable choice of primary inductance and winding resistance can do the trick effectively and at a gentler slope than 6dB per octave (because of the winding's resistance).


Can you imagine Imagine - John Lennon with vocal bass heaviness?


Reference:


Sound picture recording and reproducing Characteristcs - D. P. Lowe, K. F. Morgan - Journal of the society of motion picture engineers