I have trouble believing that vibration traveling thru the air and vibrating a SS amp could have much effect. Audible!? Does the effect get worse when you turn it WAY up?
Now, what is the modulus of elasticity of silicon? I know from experience that it is pretty brittle. A silicon wafer, from which integrated circuits and planar devices is manufactured is weird stuff. It'll break along 'cleave' lines in the crystal and if you 'tink' it with a snapping finger, it sounds almost metallic.
Indeed, Silicon is a metalloid, a material having both insulating and conductive properties....Thus 'Semiconductor'. An integrated circuit is composed of many layers and many different materials. Oxides of silicon, Silicon Nitride, Poly amorphous Silicon, Aluminum, and various doping materials all go in to the fabrication of such devices. IC's are NOT a single chunk with a definable resonant frequency. I also suspect that it will resonate at different frequencies in different directions in the material, depending on what they start with.
I'll look up 'resonister', but so far a google has resulted only in some patent application paperwork.
A look at 'Solid State Resonance' likewise yields no hifi applications at first glance.
Now there IS a form of SS resonance which can 100% effect a circuit. If you have anything Piezoelectric, this WILL HAVE an effect. Old 'ceramic' phono cartridges come to mind. Other parts may also have such effects.
Audible? Now there's the question. The post immediately above this one suggests moving stuff to its own enclosure or another room. This would be a great way to test this idea.
Also, kind of an aside: Isn't iridium a metal and as such a conductor? Haven't you added another conductive plane to whatever you painted with it? Will anyone now be able to fix a board which needs a part replaced? Didn't you form another capacitor putting a conductor over an insulator which is than over another conductor?
