Before revision: This can be approximated by interpolating Bessel filter attenuation tables, or calculated with high accuracy Setting the cut-off attenuation frequency involves first finding the frequency that achieves the desired attenuation, which will be referred to as , and then scaling the polynomials to the inverse of that frequency.
After revision: Setting the cut-off attenuation frequency involves first finding the frequency that achieves the desired attenuation, which will be referred to as , and then scaling the polynomials to the inverse of that frequency.