What are the sound types/categories when i upload a sound?

The sounds get roughly classified into 7 sound-categories i made up to sort sounds into broad categories. The finer categorisation is done by freely tagging the sound with your keywords which also automatically build the index of this archive.

You can categorise your sound as:

1. Single Subject
2. Collage
3. Natural
4. Characteristic
5. Human
6. Synthesized
7. Tone / Tune
8. Experiment

Explanation

1. Single Subject
   The great devide of sounds between "single subject sounds" and "multi-subject-sounds".
   The sound tells of only one subject. It's concentrated on the sound of only one thing. It does not consist of different sounds of different things.
   Example: if you a hear a dog bark, and yelp and pant in a sound it can be a single subject sound - the subject is the dog.
   Negative example: If you hear people talk, a dog barking and a bicycle drive past in one sound it is NOT a single-subject sound.
   
2. Collage
   Copy and pasted mix of sounds that are put in a set. Say, i made a collage of different dog barking sounds to show a full range of different dog barking aspects. They were not recorded like that in real-time. I mixed the best pieces into one collage.

3. Natural
   Recorded the subject as is and did not alter it in any way. There is the sound-source and here is the mic. Can be a football-game, can be a duck, can be an elevator or anything. Sounds can be either natural or synthesized.

4. Characteristic
   Ask youself: is the sound you recorded characteristic for the think you recorded, or rather uncharacteristic? Is it a very characteristic typical dog bark or rather strange barking?

5. Human
   Any sounds made with the human body.

6. Synthesized
   Wave of the sound is generated with electrical / digital devices. Frequency modulation synthesis.

7. Tone / Tune
   Sound consists of tones. Is a tune perhaps with rythm, perhaps has melody. Or is a tone of a distinct pitch. The cellphone beeping a sharp C (also beeing "synthesized" in this case).

8. Experiment
   You experimented with stuff.

To the first question:
Is there a need for the classification of Atmo sounds? What would be the definition of atmo sounds? What is an atmospheric sound and what not?

The categorisation of sounds is a constant topic to debate and to adjust to the needs of this site. There are countless ways to give the world of sound a taxonomy. I think i have found a quite allright start for a classification for the moment.