All sources of noise are natural. Noise is otherwise defined as soundwaves, which vibrate through matter until they reach your eardrums and the energy used to cause the vibrations is translated into noise by your brain -the pitch is determined by the frequency of the vibrations-. Anyway, it does not matter how the soundwaves are created, it is all natural. You cannot create synthetic noises as far as the physics are concerned.
No
eardrum
Yes
Soundwaves - 1983 was released on: USA: 30 March 1983 (San Francisco, California)
No.
soundwaves
The cast of Soundwaves - 1983 includes: Steven Kirk as Himself - Host Dennis Willis as Himself - Host
?? soundwaves?
Talking and listening.
That would be frequency.
Anything that vibrates will produce a sound.