> Aren't exponential and logarithmic essentially the same thing I'm pretty sure they are, as in, you use a logarithmic graph to more easily depict an exponential curve. So a signal's either adding the same amount each time (linear) or doubling it (exponential).

The are as similarly "same" to each other than multiplication and
dividison are to each other. It depends which variable you are
considering in relation to the other.

In my opinion, when generating frequencies, it's better to call it
exponential, since the output is exponential in relation to the input.
And it's more natural to describe functions as the output they are
generating. (In math the function and its output are often
exchangeable in discussion.)

- Ville Oikarinen