I can provide information about the phenomenon known as the "worldwide hum."
The worldwide hum refers to a mysterious low-frequency sound that has been reported by people in various locations around the world. It is often described as a persistent, low-pitched rumbling or humming noise that is not easily detectable by traditional sound measuring instruments. Some people report hearing it mainly at night while others may perceive it at any time.
While there have been numerous reports of the worldwide hum, its exact cause remains uncertain. Various theories have been proposed to explain the phenomenon, but none have been definitively proven. Here are a few of the proposed explanations:
Environmental Factors: Some researchers speculate that the hum could be related to natural processes such as atmospheric pressure variations, geological movements, or oceanic waves. These factors may generate low-frequency vibrations that are perceived as a hum.
Industrial or Technological Sources: Another theory suggests that the hum may originate from human-made sources, such as industrial machinery, ventilation systems, or electrical grids. It is possible that certain low-frequency vibrations produced by these sources could be transmitted through the ground or air and be audible to some individuals.
Psychological Factors: Some experts suggest that the worldwide hum could be a subjective experience resulting from heightened sensitivity to normal background noises. This could be attributed to factors such as anxiety, stress, or hyperacusis (increased sensitivity to sound).
It's worth noting that not everyone can perceive the worldwide hum, and its occurrence seems to vary among individuals and locations. The fact that it is more commonly reported at night might be influenced by the quieter environment during nighttime, allowing individuals to notice faint sounds that might otherwise be masked by daytime noises.
Despite ongoing investigations, no definitive explanation for the worldwide hum has been found to date. Researchers continue to study the phenomenon, hoping to gain a better understanding of its origin and the factors contributing to it.