The Hum Map survey form has been clobbered, and I have many hundreds of potential data points to sift through. Before I even consider my next update, we need to ferret out the bad map points. If every read of this blog would commit to examining 10 Hum Map points, we can really increase the validity of the Hum Map.
The World Hum is a low frequency sound – or perception of sound – whose source cannot be found. Countless descriptions have been offered, but the most agreed-upon description is that it sounds like a truck is idling down the street. Many people have described it as a big piece of machinery operating in the distance. It has been described as the mains hum made by a speaker or amplifier turned up loud but without music. The sound made by a fridge in the next room has been mentioned many times as well. Some people have used the image of a train locomotive idling a long distance away.
It is not a high pitched tone, a screeching metallic noise, or the sound of trumpets. If you see any apocalyptic references or other nonsense material in the Hum Database, let me know. Also be on the lookout for inappropriate web links.
The Hum is louder at night than during the day (in the vast majority of cases).
The Worldwide Hum is louder indoors than outdoors.
The Hum can appear out of nowhere, or gradually increase until at some point you take notice of it. It can wax and wane over time.
A significant proportion of hearers sense a type of bodily vibration or ear pain as well.
If you think you have found a bad Hum Map point, contact me directly at email@example.com. Please provide the timestamp and physical location of the Map point.