DSU, this was the most earth shattering paragraph from your attachment:
High CV formulations of barium titanate (the base ceramic material for most dielectric systems) exhibit a microphonic effect. For example, if one takes a Y5V capacitor and subjects it to a DC bias with a superimposed signal (e.g. 1kHz sine wave), the capacitor will start to “sing”. This mechanism is also reversible, which means a 1kHz external signal will cause generation of a 1kHz noise to the electrical signal. Niobium Oxide capacitors exhibit no such microphonic effect despite its ceramic material powder.
Ah, who am I kidding. I understood none of that. But I got a half dozen people to read it!! Hope it makes us money. And... GO SRSR