Design of Teaching Case for Spectrum Analysis in Signal and System
In response to the difficulties encountered in understanding the content of signal and system courses,and the intimidation caused by mathematical formulas,a signal processing teaching model focu-sing on sound signals has been designed.This model covers the representation of signals and systems in the time and frequency domains,the characteristics of signal changes after passing through a system,and the application of these principles in various professional fields.In the implementation of the course,the teaching is carried out in a gradual and progressive manner around the key knowledge points,ensuring the thinking continuity and the learning efficiency of the students.In practice,based on phased testing and questionnaire surveys,it was found that more and more students begin to deeply understand the connota-tion and application of spectral analysis after applying this teaching case.