You can use this utility to sample sounds of different frequencies. You
can make a rough check of your audible range and compare it to the one given
in Section 15.4. Note that the speakers of your computer may not be able
to produce the sound range required. You can use the utility to listen to
pure tone waves as well as more complicated waveforms. You can also use
it to do a Fourier analysis of a wave: identify the pure tone components
of the waveform.