I'm searching for a monitor that has voice activation/"VOX" and can screen out the white noise machine. I'd like something that will turn on only when the baby cries! Is there anything like that out there???

I'd prefer a video monitor. I'm having a hard time wading through the Amazon reviews to find something that has VOX and is reliable.

I currently have a foscam monitor but it has shut itself off twice in the middle of the night and I no longer trust it.