Indoor 90 degree camera

[pozzello]

the tried & true Hikvision box cams DS-2CD2432F-IW and similar have two-way audio with a built-in speaker.
granted, it's not a great speaker, but it's there. Available with 2.8mm lenses, which would give you the required 90 degree FoV...

 

[crw030]

Certainly not optimal in a corner. 1/3 of your FoV would be wall.

Yeah, really need like a 3.6-4mm lens or so that is closer to 90 degree.