There is an incredibly loud cricket somewhere near my bedroom, how can I find it?

Seriously, I am in the other room, and the thing is so loud that it’s giving me a headache. I can’t imagine trying to fall asleep tonight. I’ve been trying to pinpoint where the sound is coming from, but I can’t find it. It sounds like it’s near the door, so I can’t tell whether it’s inside the room or outside somewhere in the bushes. Any tips regarding how I might find the bugger?