Check around your base and top of the tower, also sitting at the computer and looking out the windows in your base is always a good idea if you find yourself "stuck" in an event. I've never had what you're talking about but this is my typical solution for ending events. Maybe post the video for the sole reason of hearing the sound.
Viewing post in Voices of the Void 0.8.1 Bug Reports
The link doesn't embed to the right time but at 10:36:31 is probably the best time to hear it. (Please ignore me being slightly irate at this point)
Event started sometime before 7:40:57 and "ended" when I made my character die at 10:41:11 to end the three hour nightmare.
I also tried to track down the noise at some point but had no luck, and with in the three hours I did look out the window, use the computer and go on top of the radio tower.
Yeah that is weird, i've heard that noise before but it's weird that the event happened with no real signifier. most of the time you'll at least hear a noise or something but you just happened to try to pause. this update was pushed out kind of quickly though according to the dev so glitches are expected. all i can really think is maybe sending kerfur out to do something and checking the basement. Are you running mods?
It's a common bug that people have been running into with this new version (some kind of event that triggers the meta-paranoia and just doesn't end). One way I've found to force a save is to clip into the backrooms. I crawl under the base (using that floor triangle with no collision by the front door to the left of the mailbox) and shoving myself into a corner and ragdolling until I clip somewhere and it sends me to the backrooms. I have stuff in the mailbox, so whenever the game saves it makes an alert noise, and I can hear it right before I'm transported. It's been working so far.