Hello there. I'm an electrical engineering major and I have a question regarding a project I'm working on.

I'm supposed to design 3 band-reject filters on matlab for echo cancellation/suppression then implement it on FPGA.

My problem is not with filter designing but with taking acoustic measurements of a classroom since I have little or no information in that area.

The professor suggested taking coefficients using impulse response invariant!
I could not find something solid while searching online.

So my question is, what is the simplest way of taking acoustic measurements of a normal size classroom, and how to find the coefficients through impulse response?

All suggestions are appreciated, current tools I have (dynamic mic, speakers, audio interface (focusrite scarlet 2i2), RoomEQ wizard, matlab/simulink, FPGA DE2 board with cyclone)

I tried using RoomEQ wizard and followed their tutorial, but did not work properly or maybe I'm not looking at where I`m supposed to.