Overpowering, frightening, and extremely loud sounds coming from above.My boyfriend and I went into our screened in porch to smoke a cigarette together, while smoking, we heard a strange noise in the distance, shrugged it off and decided “Oh it’s just wind or traffic noise”, though there were no cars and it was very calm and still weather. We finished our cigarettes and went back into the house, only to hear the noise growing louder and louder. We went back into the porch, and even our cats seemed to be upset over the noise. The sound was very loud and overpowering, it sounded similar to a strong violent windstorm with the following sounds coming from inside it: large vacuum cleaner, heavy rotating machinery, electrical humming or buzzing. The sound was all around us but coming from above, our first instinct was to look towards the sky, but the sky was clear. Then we tried to make sense of it, the loudness of it should have caused vibrations in the ground but there were none, we felt like we should take cover from the wind but it was calm and still. It lasted for about an hour and a half, give or take, and then suddenly came to an immediate stop. During the time the sound was active, the sound would fade in and out. We were surprised once it ended that our neighbors were not woken by the noise and outside wondering the same things we were. This was not the first time this has happened, we experienced the same exact thing a few months ago. The first experience was not as loud and disruptive as the second. The day after the first experience, I logged into my Facebook to check my Facebook feed and catch up with friends, when I noticed a post that my cousin in Ohio had made. She had complained about a “loud giant vacuum like noise” that had kept her up most of the night. Her post was made about an hour or so after we heard the noise at our house. Maybe a coincidence, but I personally have become a UFO believer since the recent experiences I’ve had. During the second experience, my boyfriend had captured video of the sound, and video of what it sounded like after the sound had stopped.