Classe Audio
"Microphonics, caused by component vibration and magnetic interference from the passage of electric current through them, has plagued audio designers since the beginning of recorded sound. Isolation is the key. At Classé, we begin with a unique front-end circuit topology that mechanically decouples vibration-sensitive components from all sources of vibration. In addition, our transformers rest on a specially designed plate to draw magnetic fields away from the circuitry."
Boulder
"Every critical audio circuit board in the new 3050 is framed in an innovative, custom machined, aerospace-grade aluminum housing rather than screwed to a plate. Vibration damping material is then sandwiched between the circuit board and the frame in order to eliminate even the tiniest mechanical resonances that could have any possible effect on the clarity of the musical signal."
Jeff Rowland
"The control of resonances is very important, especially in the preamplifier itself. Rowland takes a high-mass structure, which is very difficult to move, and further isolates the circuit board within, so that it is not influenced by any outside vibrations. Around 1985, he noticed that as he started putting more screws in the circuit board and tighten it down more, it would sound better, "more dimensional and quieter."
"Normally we don’t think of the contribution of microphonics on solid-state equipment, but as our circuit topologies become more perfect and ideal, then we have to start paying more attention to these other higher-order effects – the contribution of vibration and movement on the actual circuit itself."
Wikipedia on microphonics
"With the advent of solid-state electronics (transistors), this major source of microphonics (tubes) was eliminated but smaller sources still remain.
The ceramic EIA Class 2 dielectrics used in high-K capacitors ("Z5U" and "X7R") are piezoelectric and directly transform mechanical vibration into a voltage in exactly the same way as a ceramic or piezoelectric microphone.[2] Film capacitors using soft (mechanically compliant) dielectric materials can also be microphonic due to vibrational energy physically moving the plates of the capacitor. Likewise, variable capacitors using air as a dielectric are vulnerable to vibrations moving the plates. Capacitors using glass as the dielectric, while quite expensive, can be made to be essentially nonmicrophonic.
Wiring and cables can also exhibit microphonics as charged conductors move around, and various materials can develop triboelectric ("static") charges that couple to the electronic circuits."
Disclaimer - Just FIY - no AES science at all!
IMHO the subject is not deeply studied because the economic interest on the high-end market is too small to pay for research and the basic principles are empirically known by high-end designers.