I was watching TV when suddenly a loud high frequency sound started. At first, I thought it was from the video, but even after muting it, the noise didn’t stop. I checked every room, and although it seemed quieter in other areas, it was still really loud. When I returned to the living room, it was even louder. I got so frustrated that I turned off all the electricity in my apartment, but the sound persisted!
Then, I decided to go outside the apartment and even to the street, but the sound was still really loud. I couldn’t believe it; I thought I was losing my mind. It definitely wasn’t just in my head because the volume decreased when I plugged my ears.
After that, I called the building owner and noticed the sound got louder again. I thought maybe it was my phone! I held the phone to my ears, and sure enough, it was coming from there! Nothing was playing, so I rebooted it, and the sound went away.
To clarify, when I noticed the quieter sound in other rooms, it was because I had left my phone in the living room. The strange part is that the sound was so high-pitched I couldn’t figure out where it was coming from. How can a phone make a noise that loud?
What could be causing this? Has anyone experienced something like this?
Smart switches might emit high frequency sounds to send signals. Maybe a glitch triggered this. Some sleep apps also use ultrasound to track breathing. You might be young enough to hear this sound, but a glitch could explain why it was so loud. Usually, these sounds are quiet because they are controlled by hardware.