$1)$ Use your phone or computer to record your voice $(5-10$ seconds$).$

Import the file into Matlab using the 'audioread' function. Note the sampling rate.

Make a plot of the signal using the correct time axis $($in seconds$).$ Use

$>>$ xlabel$($Time $($seconds$))$

to create the horizontal axis label.

Also plot a short section of your signal showing a segment that is approximately

periodic. Save your figure$($s$)$ as a pdf file using

$>>$ print $-$dpdf $-$bestfit filename.pdf

Submit your audio file, your matlab file $(.$m file$),$ and the pdf file of your figure