After the analysis of the relation between metaphor and semantics and the exploration of semantic filtering model in metaphor comprehension,we put forward the ways of avoiding the metaphor cognitive faults and enhancing the second language learning effect by means of the application of semantic filtering model.

This paper investigates into the effect that rhetorical methods have on the meaning of discourses,pointing out the phenomenon of semantic filtering,semantic similarity,semantic parallel-connection that appear under the effect of rhetorical methods,and analyses the mechanism that produces the phenomenon.

Unlike traditional voiceprint recognition,speech filter is applied to preprocessing of the recognition system,and emotional compensation approach is used throughout the whole process of characteristics extraction.