[nagyf]

To add to this: Some other hot women are using 3D* microphones and they do nothing but moan into the mic (like if they were having sex or similar), and making "licking noises" and other similar stuff.

* Edit: no idea what are these called, but sometimes they moan and lick the left side, sometimes the right so you can hear it in your corresponding ear.

[jaywalk]

Stereo microphone is the term you're looking for.

[cinntaile]

ASMR (autonomous sensory meridian response)

https://en.m.wikipedia.org/wiki/ASMR