The relationship between capacitance and voltage in a condenser microphone

[PureMutant]

I'm reading Modern Recording Techniques 7th ed. and do not fully grasp the relationship between capacitance and voltage in a condenser mic.

They say that capacitance is inversely proportional to voltage i.e. when the diaphragm moves inward the capacitance is high and the voltage low and vice versa. Moreover, inward diaphragm movement produces positive polarity and vice versa

This is what I do not understand:

How does the inward movement of the diaphragm produce a positive polarity when the voltage is low? I assumed this would be the other way around i.e. inward movement create a higher voltage and therefore positive polarity.

Can anybody shed light on this and help explain/fill in some gaps in my knowledge?

Thanks.

 

[mixsit]

Subscribing for geeky stuff

 

[miroslav]

How does the inward movement of the diaphragm produce a positive polarity when the voltage is low?

Mmmmmm....
...since sound wave pressure on the diaphragm is going to produce positive polarity on one of the XLR pins and reverse on the other...it's a ying/yang thing, they are both happening all the time, right?
The only thing then you need to know is which pin is getting positive polarity when the pressure is pushing in on the diaphragn...and which pin is getting negative/reverse polarity, and wire the mic accordingly.
IOW...you can easily wire the mic so that pressure pushing in generates negative/reverse polarity...it's not an absolute thing.