Yeah, I am with the chorus of people -- that's clearly the low-battery noise from a smoke detector, and most likely some crazy former property owner rebuilt that wall, and forgot to pull down the detector before putting up the new drywall. (I bought a house that was built in 1940, occupied by the guy who built it -- he was in construction -- and then subsequently "improved" by him and his kids over the course of seven decades. I'm currently in the process of spending mid-five-figures to remedy all the dumb code violations they left behind.)
It's _possible_ that if you could get ahold of a quality geiger counter, you could locate it, because a lot of smoke detectors use a small amount of radioactive material, typically Americium-241.
https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/smoke-detectors.html
You probably won't be able to detect it _through_ the wall, because it's quite low energy, and just the drywall by itself will probably be enough to block out anything that's escaping the shell of the detector. But if there's a straight-line path to it through free air, in that gap in the wall you were observing, you might well be able to sense it through that, and if that either narrows it down to a gap between two specific studs, or, even better, you can triangulate it, you'd at least have a better idea of what part of the wall to tear open to get at it.
Auros Harman
2020-05-11 00:48:07 +0000 UTC
I had 2 go out the same night - in different parts of the house - out of sync - still have ptsd from that
2020-05-10 23:52:47 +0000 UTC
This is why network television is screwed. I am more determined to watch Part 2 of this video -- which I don't even know is coming -- than any part 2 of any network drama that costs millions of dollars per episode.
Andy Ihnatko
2020-05-09 23:00:51 +0000 UTC
WHEN DOES THE SEQUEL COME OUT give me the sequel
Danielle Corsetto
2020-05-09 17:36:44 +0000 UTC
Sounds like my CO 2 detector
Divi (Lovewin)
2020-05-09 15:45:59 +0000 UTC
I would lend you my borescope to look up into that space but you are too far away
Danny Hansen
2020-05-09 13:08:05 +0000 UTC
Beeping of the tell tale heart...
Chris Crowther
2020-05-09 11:38:26 +0000 UTC
From the beep....it honestly sounds like a low battery from newer CO or smoke alarm....did one get mounted UNDER the stairs?...or fall between drywall....perhaps a glass to the ear along the wall....to remove excess echo?
Chris Endris
2020-05-09 03:09:19 +0000 UTC
If your internet connection is fiber and the interface is in the basement, you might check there. There is usually a battery back up. Battery change may require a service call. Not all units are user friendly.
Christopher Gorzelnik
2020-05-09 02:37:11 +0000 UTC
Okay I had this problem years ago and here's how I solved it. Step 1: Turn off all of the electricity in the house to rule out anything using electricity. Yes, you will have to turn off your refrigerator, but it should be okay for a while if you don't open it (and why would you, the beep is not likely in there). If you still hear the beep Step 2: go through every device that uses batteries, slowly and methodically. Take the batteries out and keep listening. Fortunately (or not) looks like your beep is on about a 60 sec interval. If you don't find it then, Step 3, call me (kidding or am I). Hearing is weird and you need more than one person to help locate whatever this is. If you think it's in the wall, I would advise a stethoscope or something of that nature to have a closer listen before you start going to town with that axe.
Melissa Armstrong
2020-05-08 23:56:46 +0000 UTC
Definitely agree with what everyone has said about a smoke or carbon monoxide detector being the source, but I don't know how it would be coming from inside the wall! Good luck, I've had that happen to me with a smoke detector before and the sound is terribly annoying :/
Shannon
2020-05-08 23:54:09 +0000 UTC
we had a phantom beep a few years ago. our installed smoke detectors - all hard wired and original equipment in our house which was built for us new - kept chirping like one of them was low battery. replaced all the batteries. kept happening. tested each unit. all sat. replaced each head unit (the sensor goes bad after xx amount of time). still happening. unplugged a completely separate CO detector from an outlet for completely separate reasons. chirp stopped. same manufacturer, but not connected in any way, and the original smoke detectors were wired direct, not plugged into outlets. insane. talked to a tech about it later & found out that both the outlet powered and direct wired units all communicate via power lines, so an add-on that you plug into an outlet joins the network as if it were wired. who knew??
Joe
2020-05-08 23:52:58 +0000 UTC
I for one am on the edge of my seat and can’t wait to see how this one ends.
RoyallyEric
2020-05-08 23:52:07 +0000 UTC
I hope you find it!!!
Chris Cook
2020-05-08 23:49:34 +0000 UTC
Definitely the same sound!
Wood
2020-05-08 23:47:49 +0000 UTC
I've had the battery in a smoke detector go, and that's the sound the evil thing kept making, so gonna 2nd/3rd/etc. a detector is the culprit if you've got one somewhere.
Candice
2020-05-08 23:45:01 +0000 UTC
I feel you, we had a case of this yesterday. We just bought the house in Oct and were trying to find the BEEP!
Alysha L
2020-05-08 23:44:16 +0000 UTC
I also think it's a detector low-battery noise, both from the sound and the periodicity... maddening, I sympathize.
Hugh Eckert
2020-05-08 23:39:21 +0000 UTC
@40 seconds on this video: https://www.youtube.com/watch?v=UV1VGlr5KCk
Do you have a carbon monoxide detector???
Ripley LaCross
2020-05-08 23:37:36 +0000 UTC
Smoke detector or carbon monoxide detector with a low battery. I am guessing it is behind the stairs or above the stairs...
epilonious
2020-05-08 23:35:00 +0000 UTC
I'm SUPER into this quarantine content.
Chris
2020-05-08 23:32:18 +0000 UTC
My first thought is smoke detector of course, but maybe its not installed, but instead just laying in the basement storage? Sound direction can be decieving with all those spaces to bounce off of. Good luck!