What language do you understand?

As for me, shouting voice are meant to trigger fear and command urgent instructions and uncontrollable angered wanting to be known. It is best used for people that are hard to control, and people that needs to be taught to listen, and that we do not need to listen to them. However, if shouting are used at a working environment or at homes or even somewhere public, it could create a very uncomfortable atmosphere. Loud voices can meant two things, the person is trying to express himself clear to a big crowd and to deliver their speech and to instruct a group of people to listen to him. It could be a positive method if used properly. The soft voices can be interpreted as gentle. But it would be inappropriate if the individual is suppose to voice out something, but barely could be heard. And lastly, slow voices also have good and bad points, wehereby, if the person speaks too slow, it could just be so annoying to listen to them when we are in a hurry. But slow speaking people could actually deliver what they say in a clearer way. The language that probably I like best is clear and loud voices when appropriate, and soft voices when speaking to each other ...

I would answer: oral language and body language.

Shouting only goes in one ear and out the other for most people, it is a proven fact actually, especially in children. Myself, soft is ok, sometimes hard to understand, loud and shouting doesn't work, Normal works for me. Normal with good speaking voice, without the slang, just clear language works.

I can understand different kinds of voices. Slow and soft means the person is speaking relaxed. Loud and hard means he wants to be smacked in the face with a baseball bat.