Idea is good but im not gonna be rude we are in technological era and everything is now "smart".
Would like just little to correct 1 to stay note and pencil, that now it just to be done and can be good indicator that someone is willing to do this.
Second can be tape recorder or something similar to this, cuz we have this in past and they usually done this with some sort of taperecorder unit.
Third can be image of person talking over phone or tablet image, this is how is done today.

All modern devices have recording and video recording so it can be like this.

We can have all eras with these images and it could look good.