Editing Humming (section)

==Humming in human evolution==
[[Joseph Jordania]] suggested that humming could have played an important role in the early human (hominid) evolution as [[contact calls]].<ref>Jordania, J. (2009). Times to Fight and Times to Relax Singing and Humming at the Beginnings of Human Evolutionary History. Kadmos, 1, 272–277</ref> Many social animals produce seemingly haphazard and indistinct sounds (like chicken cluck) when they are going about their everyday business (foraging, feeding). These sounds let group members know that they are among kin and there is no danger. In the case of the appearance of any signs of danger (such as suspicious sounds or movements in a forest), the animal that notices danger first, stops moving, stops producing sounds, remains silent and looks in the direction of the danger sign. Other animals quickly follow suit and very soon all the group is silent and is scanning the environment for possible danger.

[[Charles Darwin]] was the first to notice this phenomenon on the example of the wild horses and the cattle.<ref>Darwin, Charles. (1871). Descent of Men. 2004:123</ref> [[Joseph Jordania]] suggested that for humans, as for many social animals, silence can be a sign of danger, and that's why gentle humming and musical sounds relax humans (see the use of gentle music in [[music therapy]], [[lullaby|lullabies]]).<ref>[http://symposium.polyphony.ge/wp-content/uploads/2016/04/02.Joseph-Jordania.eng_.pdf Jordania, Joseph (2010). ''Music and Emotions: humming in Human Prehistory'' (proceedings of the International Symposium on Traditional Polyphony, held in Tbilisi, Georgia in 2008]</ref>