Question: Listening to Aliasing If your computer has the capability for sound output from MATLAB through a DIA converter and a speaker, it will be interesting to listen to the aliased signals created in the previous exercises. To get a reasonable signal, it is necessary to create a much longer signal-perhaps I or 2 s in duration. In addition, the signal samples must be created at the natural sampling rate of the DI A converter.
a. For the sampled sinusoid, it makes sense to concatenate several segments, consisting of the sinusoids of slightly different Frequency. Each one should be about 200 ms in duration, so putting together 5 to IO of these will make a signal that can be heard for I to 2 s.
b. For the chirp, the duration must be much longer than 50 ms, so the parameterµ must be adjusted to get a swept frequency range that passes through only a few aliases. See if you can pick µ so that a 2-s chirp will pass through exactly 5 aliases. This value forµ will depend on the sampling rate of the DIA converter on your computer system.