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Originally posted by notknowing
Today at times the HUM or something is vibrating pretty strongly and loud enough for my "deaf" husband to hear. I wonder if it's the HUM or something else. I found a small dead warbler by one of my doors which made me wonder if the HUM affected his orientation and caused him to crash. The sound seems to be coming from the North West direction. I'm in the West Palm Beach area. I'm hoping that everyone in the world will finally hear it and wonder what the heck is that sound and actually look into it and demand some answers. Maybe we will finally get some answers. I'm dreaming, I know.
Please, anyone else noticing this change? What does it mean? Anyone?
Strange as it may seem, the Earth's atmosphere continuously rings out in a chorus of frequencies just below the reach of the human ear. This phenomenon is expressed at the Earth's surface as "infrasonic" waves – that is, waves with frequencies ranging 0.01–10 Hz – that are known to exist from acoustic recordings around the globe.
In a human, sound waves funnel into the ear via the external ear canal and hit the eardrum (tympanic membrane). Consequently the compression and rarefaction of the wave set this thin membrane in motion, causing the middle ear bones (the ossicles; malleus, incus and stapes) to move. The number of sound pressure level vibrations (sonic waves) per second denotes the frequency. Infrasonic (below hearing), sonic (aural), and ultrasonic (above hearing) frequencies are measured in Hertz (Hz); one Hertz is one cycle wave (or singular pressure wave in audionics) per second. Specifically, humans have a maximum aural range that begins as low as 12 Hz under ideal laboratory conditions, to 20,000 Hz in most children and some adults, but the range shrinks during life, usually beginning at around the age of 8 with the higher frequencies fading. Inaudible sound waves can be detected (felt) by humans through physical body vibration in the range of 4 to 16 Hz.
For their new study, Bromirski and fellow Scripps scientist Peter Gerstoft collected data between November 2006 and June 2007 from a U.S.-based array of sensors that can read global seismic activity.
The pair found that the hum is most intense along the Pacific coasts of North and Central America and the west coasts of Europe.