Late at night on the 26th of March 2018, I went downstairs to get some snacks. When I returned to my room upstairs, I noticed a strange beeping sound. At first it seemed regular, consistent, if you will. Naturally, I was worried by this, so I attempted to locate the source of it. I searched my brother's room, the game room, and I even went downstairs and searched the study to see if I could find its source or someone who could help me identify it. No such luck. It only seemed to grow weaker as I went further from the stairs.
Then, as I attempted to find anything that could be making the sound near the stairs, the beeping sound slowly started to become more and more irregular with its frequencies, and just as slowly it began to increase in volume, but never deviating in its middle pitch, possibly about 200 hertz. At one point it sounded like Morse code but, when I interpreted it the code appeared to be utter nonsense: aljfexb STOP edxeitas STOP. And then it just started beeping rapidly, about 5 or 6 times a second, with 2 to 3 second intervals of silence. Thoroughly creeped out, I retreated to my room. To this day, I have no clue what that sound was.

Update March 28,

At least I know I'm not insane now, I'm not the only person who could hear it. I asked my brother if he could hear a beeping noise in that place since he spends alot of his time hanging out in his room early in the morning (think 2 am), and he told me that he could, but he still didn't know what it was.