Called anthrophony, it includes all of the sound that humans produce, whether structured (i. e. music, theatre, film, etc.
The historical background of natural sounds as they have come to be defined, begins with the recording of a single bird, by Ludwig Koch, as early as 1889.
In late 1968, influenced by acoustic efforts in the fields of music and film, this model began to evolve into a much more holistic effort with attention paid to the acoustic experience of entire habitats, inclusive of all the wild animal voices.
Humans can benefit from natural environments to restore from stress and directed attention fatigue.
These are sounds made by the male baboon to attract females to his territory for courtship and mating.
Again, the strength, quality, and timbre of those sounds, often determine the ability of that species to attract females for reproduction.