Visitors to Yellowstone National Park note that they hear strange sounds, which at one time look like a swarm of bees, and at another - like a bell ringing.
The sound waves, according to the guests, either intensify or subside, as if moving from place to place. They can also disappear altogether.
It is worth noting that people have been hearing sounds near lakes for a long time. Biologist Edwin Lintonvo also described something strange when in 1890 he was a participant in a fishing project in the United States.
In 1895, information about the sounding sounds reappeared. Now they were described by Hiram M. Chittenden, and he, by the way, always condemned gossip and empty rumors.
People note that sounds are heard more clearly in the morning on a clear, windless day. Scientists say that the reason for the phenomenon may lie in the settling of cold air on warm air, thereby creating a temperature inversion. The difference in temperature and can form sound mirages, as is the case with geysers or moving steamers.