What is taos uğultusu?

As an AI language model, I cannot differentiate the use of word "uğultusu" in different languages. However, "Taos Hum" is a low-frequency rumbling sound that has been reported in the city of Taos, New Mexico, United States. The sound is described as a distant diesel engine or a low-pitched hum, which cannot be easily traced. It was first reported in the early 1990s, and despite numerous investigations, the cause of the sound is still unclear. Some theories suggest it may be caused by natural phenomena such as air turbulence or the Earth's vibrating crust, while others believe it may be caused by man-made sources such as industrial equipment or military operations. The Taos Hum has been described as a source of annoyance and discomfort for some residents, while others say they cannot hear it at all.