在8L的转贴里有一句话（如下），算是得到了验证。
“Piezoelectric effects can result in noise for ferroelectric ceramic chips, such as those of the middle to high dielectric constants like X5R, X7R, X8R, Y5V, Y5U, Z5U, etc. Piezoelectricity occurs in all ferroelectric dielectrics, regardless of manufacturer, and the means to reduce these effects usually requires the dielectric constant be lowered (the capacitance capability is also lowered with the lower dielectric constant) while moving to higher dielectrics (Y5V, Z5V are usually cheaper) creates a higher susceptibility to this effect. ”
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