Need intuition on the frequency response of a signal I'm currently taking a course on signals and systems, and even though we are much ahead of frequency response, I still feel like I am missing an intuitive grasp of what the frequency response of a signal is. Specifically, when I look at the various CTFT pairs, it's difficult for me to intuitively understand why the pairs make sense. 

If someone could provide an intuitive explanation of what frequency response is, that would be much appreciated!

Thanks
The frequency response tells you how a system reacts to a sinusoidal excitation of a given frequency, in terms of amplitude and phase.

As any signal, periodic or not, can be described as a sum of sinusoids, this allows you to deduce the response to any signal, by the superposition principle.

Interesting features of the frequency response are the continuous gain, the presence of resonances and the bandwidth. A flat curve reproduces the original excitation without deformations.

You get a feeling of a frequency response when looking at how a slowing spin-drier vibrates.