Possible theories for what has been described as 'hum' and 'rumbling' range from VLF transmissions to submarines to “ 'nothing more than the grand accumulation of human activity' that could include noise from highways, marine traffic, mining, windmill farms, hydroelectric dams and other forms of industry."
MacPherson speculates that some people may indeed be sensitive to VLF frequencies.
“When I say VLF, I’m not referring to sound,” MacPherson said. “That leads to another striking and startling conclusion, the fact that the Hum may not be a sound in the traditional sense. It may be the body’s reaction to a particular band of radio frequencies. That’s not an outrageous idea. The concept that the body can interpret certain electromagnetic frequencies as sound is reasonably well-established in research literature.”
MacPherson has now built a large Faraday cage to follow up with his VLF theory.
So far, over 9000 reports of the mysterious Hum have been filed on MacPherson's website's database and plans to translate the site into Chinese will likely see that number soon rising.
Here on Mayne Island, it is very quiet and stepping outside on a winter night when there is no wind or no waves hitting the beach there is truly not a single thing to be heard, including the Hum. I do however, on warm summer evenings, often hear the rumblings coming from the Roberts Bank coal loading facility and container port, on the other side of Georgia Strait about 12 miles away.
|Roberts Bank courtesy: http://www.vancouversun.com|
Perhaps you can hear the Hum as well and might like to report it or discuss possible sources with others.