About a year ago, I was lying on my bed, about to fall asleep, and then I started hearing a heavy noise, kinda strange, almost mechanical. It sounded like "Zzzzzmmmmzzzzmmmmzzzzmmmmmzzzzzmmmmmzzzzzmmmmmzzzzmmmmm" and did last for about 10 minutes. Kinda felt like the sound came from everywhere around.... It was somehow scary.
The day after, I asked to the people in the house if they did hear something the night before, and I realized I was the only one that heard the noise, so I assumed it was some kind of strange hallucination and forgot about it.
Then, a few days ago, I found some articles about "Hums" all around the world, and as I read I suddenly remembered that noise I heard. All the descriptions and reproductions of Hums I´ve found on the net sound exactly like what I heard, but I couldn´t find a case of reported hums here in Guatemala.
Has anyone of you experienced something similar before? It´d be great having some info ´bout other people´s hum experiences.