ABSTRACT
Realistically, vision system assist human acquire more than 80 % information from environment, while for audition about 15 %, which is the most important access to information in addition to visual sense. Visual presentation refers to information presentation and communication through visual stimulation, and voice is way to present and transmit information for auditory presentation. In actual tasks, auditory presentation acts as a significant supplement to visual presentation, which means we can also get information through audition when visual sense is limited, or unworkable, or not suitable.
