Convolution

The system output y(t) is the system input x(t) convolved with the impulse response h(t).

Flip h(t) and slide it past x(t). At a given location, the area of the product yields y(t) for that location.

The demo can be run off-line using a hard-copy downloadable as a .pdf file here.

Print on an 8.5" x 11" overhead transparency, cut in half on the dotted line, flip the top half and slide it past the bottom half.