Why do wine glasses emit static noise?

This is called seashell resonance.

Yup. Heimholtz resonance.

One other thing that I noticed was that the sound was lowest in pitch as my ear was closest to the glass.

@PhiNotPi That may be a function of the sound waves bouncing and resonating off your ear. No idea.

I was thinking that the airflow is constricted between my face and the wineglass. Helmholtz resonators, such as the ocarina, produce lower-frequency sounds as the area of the open holes decreases. In this case, the “hole” would be the space between my face and the glass.

It turns out that both @thorninmud and @Rarebear are correct. It’s a Helmholtz resonator that amplifies the ambient sound.

more info (this goes into the math of calculating the pitch, and explains all of my observations)