Sure & a brass block on a CPU might just isolate it from emitting EMI, also. Just saying!DaveF wrote: For EMI isolation and to also protect against the IC's giving off emissions themselves. You'll see plenty of this type of metal canned or sheilded versions for military & aerospace applications.
Well for clocks, it doesn't need to be kicked around for a measurable effect to be caused at it's outputIf these devices are operating in hazardous enviroments where they might get kicked around then yeah isolation or bracing etc can be applied to the devices/pcbs to alleviate mechanical problems.
I'm not sure if you are talking about the Triboelectric effect or not but any time two different materials are rubbed together (as can be caused by vibrations) a small electric charge is generated within both materials - a static charge. I could see this having an effect on small signal carrying devices, cables etc.Some Optics on the other hand are prone to vibration: lasers, inferometers and fibre optic cabling but only at frequencies in the THz range.
Again, the audibility of such effects in audio circuits is not something I'm attesting to, just pointing out that the possible underlying mechanisms are well known.
