When we talk in oral languages, one of the element we must control is our tone.
Speaking loudly or whispering can influence our message, much like the words we use. Every situation requires different vocal tones. Also, depending on the language the "neutral" vocal tone will change. let use the perspective that native Ecuadorian speakers have on native Spaniard speakers; they are simply too loud, grotesque and sound backwards.
In sign languages, the vocal tone is equivalent to hands movements and facial expressions. When we sign we move our hands in a space which is generally noted vertically between the head and waist and horizontally an area double the size of our back.
However, interesting fact is this space is no universal. Every sign language has its own. Depending which one we are talk we can be "shouting" or not. If we take Spanish Sign Language and British Sign Language, we can see this difference.
