# Is it right to talk about dynamic range on frequency domain?

I'm comparing three frequency response's plots from simulations and experiments and I observed that two of them look like clamped to a DC component, where the max dB value is i.e. 100 and the min is 40 dB, while on the third one the max is i.e. 120 dB and the min is 10 dB. I want to use the correct term to talk about these intervals.

I've used the term dynamic range to express an amplitude variation interval on time domain, but is it right to use it on frequency domain too?

• so you would like to say that the first has a "spectral dynamic range" of 60 dB and the latter has a spectral dynamic range of 110 dB? what might you want to do about holes in the spectrum? like what if the output is from a notch filter and there are some frequencies where it's $-\infty$ dB level? what would the dynamic range be for that? – robert bristow-johnson Oct 22 '18 at 23:36