In this lab you will work on the problem of removing an echo from a recording of a speech signal. an echo has a couple of parameters: the first parameter is the delay: to seconds (or n samples). the second parameter is the amplitude of the echo: α. the lab has the following parts:

1. create the echo signal. you will add an echo to a speech signal.
2. remove the echo. you will remove an echo from a speech signal. in this part you know what the echo parameters to and α are.
3. estimating unknown echo parameters. you will try to determine the echo parameters to and α from a speech signal, and then remo