Vibration Control

I’m not sure I follow all of that but so far, no one has explained how physical vibrational energy gets transformed into electrical energy in a solid state device w/ no moving parts. 

Both vibrational energies share the same space. It is called electro-mechanical vibration. Electricity is the electro and the mechanical is created by transformers and capacitors vibrating, sound pressure levels, environmental noise, chassis vibrating, the listening suite, etc.

Parts in a solid-state design are moving. Unfortunately, we cannot detect microns of movement with our eyes.

Glennewdick, good post.

I am not a theoretical physicist. One would require their opinions in abundance to answer your request for an explanation. Then you would need the knowledge to understand how they arrived at those outcomes. 

Proving that resonance energy transfer increases performance is highly audible. All equipment builds resonance. Evacuating the resonance is the key to listening to more quality already built into all your equipment. The results are extremely audible.

Robert

In home audio you are beset with so many vibration issues created by playing music it's really best not to listen to anything. It's simply not worth the risk. 

@nonoise 
I do have some experience putting high end recorders and microphones in violently shaking environments in my recording career. When you put a recorder that is solid state with no moving parts you don't have to worry about vibration. In the days of Naga reel to reel recorders you couldn't use them in a race car or a roller coster simply because the Gs would cause the tape to unspool, DAT tapes wouldn't work in race cars or roller coasters either because they had moving parts. But when solid state recorders came out we could put them anywhere even on jets and other high G environments.  

Consider powered speakers with DACs, amps, crossovers, network circuits inside the speakers. Powered speakers are the norm in recording studios all over the world if vibration is so clearly detrimental in sound how can recording studio monitors be internally powered.

@donavabdear 
Was the gear you placed in violently shaking environments off the shelf gear from some audio saloon or Best Buy or were they built to spec to withstand the event?
Were there brands that performed better than others?

I remember when touch controls first came out on washing machines and dryers and the failure rate of the controls was high due to the shaking, spinning and vibrations that ensued. They had to go back and better isolate the controls as well as build them to higher specs to withstand the NVH.

As for powered speakers, there are many designers who frown upon DACs and amps in speakers due to the vibrations from the speaker cones and some, for the longest time, have constructed their crossovers to reside outside of the speakers for the very same reasons, long before they started jamming other junk inside. 

All the best,
Nonoise