Basic principles of sound design

Sound is a vital aspect of motion graphics design. It’s been said that the visuals in a motion graphics project are only half the final product; that it isn’t truly complete until it's been fitted with sound. Recently, I read one book called " Audio Vision-sound on screen" by Michel Chion, which introduce the relationship between sound design and image in film.This is the best book I have seen so far on theories for sound design. I applied these theories into my Motion Graphics works.

I concluded five basic principles of sound design  in this book.

1. Synchresis: This is come from the two words " synchronism” and “synthesis”, it is a mental fusion between a sound and a visual when these occur at exactly the same time. 

2.Acousmatic: Acousmatic sound is sound one hears without seeing their originating cause - a invisible sound source.

3.Extension (of sound space):  Build the image an environment, it happened beyond the borders of the visual field or within the visual filed around the characters.

4. Empathetic: Music or sound effects whose mood matches the mood of the action,  

the ability to feel the feeling of others, like sadness, happiness, and movement.

5.Anempathetic sound: Anempathetic sound usually diegetic music - that seems to exhibit conspicuous indifference to what is going on in the film's plot, creating a strong sense of the tragic.