Tunable digital frequency response equalization filters
P.A. Regalia, Sanjit K. Mitra · IEEE Transactions on Acoustics Speech and Signal Processing · 1987
Tunable digital frequency response equalization filters, which feature adjustable gain at specified frequencies while leaving the remainder of the spectrum unaffected, are advanced. The filter structure is such that the frequency response parameters are independently related to the multiplier coefficients, which permits simple frequency response adjustment by varying the coefficient values. The resulting structure exhibits low coefficient sensitivity characteristics.