Learning introductory signal processing using multimedia

Signal processing is an important component of information engineering. Most signals dealt with in engineering are electrical signals and although tools such as oscilloscopes and spectrum analysers are available, many students struggle to comprehend the basic concepts. By dealing with acoustic signals, combined with appropriate visual displays of the signal spectra, the sequence of experiments described in this paper provides students with a useful learning experience. The concepts covered, including spectral analysis, the affects of noise on a communications channel, and aliasing, are ones that students frequently find different to grasp. Dealing with audible signals makes these concepts more concrete. The required facilities are available in the modern multimedia computer.