Context: Capacitors, especially ceramic capacitors, and older designs such as paper capacitors, can absorb sound waves resulting in a microphonic effect. Vibration moves the plates, causing the capacitance to vary, in turn inducing AC current. Some dielectrics also generate piezoelectricity. The resulting interference is especially problematic in audio applications, potentially causing feedback or unintended recording. In the reverse microphonic effect, the varying electric field between the capacitor plates exerts a physical force, moving them as a speaker. This can generate audible sound, but drains energy and stresses the dielectric and the electrolyte, if any.

Question: What is the effect called when capacitors absorb sound waves?
Answer: microphonic effect

Question: What value of a capacitor is varied when vibration moves the conducting plates? 
Answer: the capacitance

Question: What sort of current is induced when the capacitance of a capacitor is altered?
Answer: AC current

Question: In what type of applications is piezeoelectricity especially problematic?
Answer: audio applications

Question: What is it called when a changing electric field existing between the conductive plates of a capacitor physically moves them?
Answer: the reverse microphonic effect

Question:  What is the effect called when capacitors don't absorb sound waves?
Answer: Unanswerable

Question:  What value of a capacitor is not varied when vibration moves the conducting plates?
Answer: Unanswerable

Question:  What sort of current is induced when the capacitance of a capacitor is unaltered?
Answer: Unanswerable

Question: In what type of applications is piezeoelectricity never problematic?
Answer: Unanswerable

Question: What is it called when a changing electric field existing between the conductive plates of a capacitor keeps them still?
Answer: Unanswerable