Strange noise going on inside my home
Recently, I connected an old SSD I had from a few years ago.
I browsed the files, with a bit of nostalgia, until I saw a "Strange noise" sound file I had recorded, I immediately had the flashback.
During a time, there was this strange analog sound going on periodically in my house, I never caught the origin of it but it was strange, unsettling and scary, since, I'm the only one that lives here. Why would something emit a sound without my knowing of it?
It was primarily localized in my kitchen, and no, I don't have a smoke alarm or any similar device that could emit such a sound, I mean, I do have a blender, an oven and a toaster, none of them are "smart" gadgets or anything, they're rudimentary, baseline functional appliances.
It was so weird because I didn't know what was causing it, I checked all my drawers, behind the stove, everything, nothing, almost like if I was imagining it.
I decided to leave my phone recording, until I finally caught it, it was so strange, it happened at seemingly random intervals, like every 3 or 5 minutes.
It was so creepy because of how out of nowhere it was, imagine something similar happening in your home, your sanctuary, where you're supposed to be in control, it felt like that.
But, I never really got to show anyone the audio, I wasn't reddit-savvy so I didn't think of trying this subreddit, but everywhere I showed or uploaded the audio to, just got me ignored or simply got generic answers like a smoke alarm and such, with no follow up after I clarified.
Eventually it stopped, and I forgot about it, until today that I saw the file, I figured I could maybe come to a subreddit like this to figure out what this thing was.
Edit extra context: I live in Mexico, the house is made of brick, it is in it's own property, not an apartment building or similar.