How do you find the gain roll-off rate between frequencies?? is there a formula for it?

Question

How do you find the gain roll-off rate between frequencies?? is there a formula for it?

Answer 1

It depends on what sort of system you've got. You will have to work out the transfer function, the order of the transfer function (for example second order), work out the poles, zeroes, draw a Bode plot etc.

It took me a good deal of work as an undergraduate Electrical Engineer to understand these concepts. I don't know your background, but it requires special knowledge and skill to work out the answer.

Suggested reading: http://en.wikipedia.org/wiki/Bode_plot