Impulse Response

Alternatively, we can use an input signal that contains all frequency components, and then we only have to do the ``checking'' operation once.

An input signal with the broadest possible spectrum would be an impulse.

The response of a filter to an impulse is called an impulse response.

$\fbox{\parbox{5in}{Any filter in a large class known as linear, time-invariant (LTI), is completely characterized by its impulse response.}}$

What is the impulse response of this filter?

``Music 206: Delay and Digital Filters I'' by Tamara Smyth, Computing Science, Simon Fraser University.