Infrasound pretty much follows the concept of infrared light, or light at wavelengths that are just below our visible spectrum. The sound waves are at frequencies that are just below our hearing window.
Infrasonic frequencies create this feeling of unease in us because evolutionarily, we've grown to avoid the sources that create them -- big animals, earthquakes, approaching storms, etc.
Another interesting fact: in big buildings such as warehouses, the air circulation systems can create a big standing wave, resulting in that eerie feeling, and the building being labeled as "haunted." The human eye resonates at around 18Hz, right around the levels of infrasound, resulting in visual disturbances! So, if you think you see a ghost, turn off your air conditioning and check again ;)
I'm currently sitting in my little dorm room, with all of its weird posters and decorations, and looking out my window onto campus, watching cars drive by in the dark. The Christmas lights I put up around the window are hard to beat, and so is the classic holiday compilation that I stupidly bought on iTunes.
Infrasonic frequencies create this feeling of unease in us because evolutionarily, we've grown to avoid the sources that create them -- big animals, earthquakes, approaching storms, etc.
Another interesting fact: in big buildings such as warehouses, the air circulation systems can create a big standing wave, resulting in that eerie feeling, and the building being labeled as "haunted." The human eye resonates at around 18Hz, right around the levels of infrasound, resulting in visual disturbances! So, if you think you see a ghost, turn off your air conditioning and check again ;)
I'm currently sitting in my little dorm room, with all of its weird posters and decorations, and looking out my window onto campus, watching cars drive by in the dark. The Christmas lights I put up around the window are hard to beat, and so is the classic holiday compilation that I stupidly bought on iTunes.
I hate pumpkin pie.
I'm getting ready for finals, and I have all my business together, including a job opportunity over the break. I'm pretending that people read this.
Christmas break will be nice, as I won't have any work to do, but I'm really only happy when I'm busy, and it's almost 4 weeks long, which is a long time to spend with my family and without Martin. You get spoiled, being able to live completely on your own schedule; I'm not used to eating, sleeping, and working exactly when three other people do. I think I'll leave my full computer here, and just take my netbook home, then I can completely detox of school and technology...worried that I'll regret that, but we'll see.
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