已回答假定已回答

如何计算Linkwitz-Riley,Butterworth和 Bessel 滤波器不同斜率的参数值?

wenlion 在 2017-3-13 詢問的問題
最後回覆由HenryL於2017-4-8提供

大家好,我根据<FilterMathCalculations.pdf>文档中的公式可以计算出Linkwitz-Riley – 12 dB/oct, Linkwitz-Riley – 24 dB/oct,Linkwitz-Riley – 36 dB/oct和 Linkwitz-Riley – 48 dB/oct的参数。但是因为产品要求还要支持18dB/oct,30dB/oct ,42 dB/oct斜率,所以自行根据文档推断:

Linkwitz-Riley – 18 dB/oct =  1st order butterworth +  2nd order butterworth

Linkwitz-Riley – 30 dB/oct = 2nd order butterworth + 3rd order butterworth

Linkwitz-Riley – 42 dB/oct =3rd order butterworth +  4th order butterworth

请问这样的推断是否正确?

还有像Butterworth 30 dB/oct, Butterworth 36 dB/oct ,Butterworth 42 dB/oct及Butterworth 48 dB/oct,还有

Bessel 30 dB/oct, Bessel 36 dB/oct, Bessel 42 dB/oct, Bessel 48 dB/oct这些又要如何计算参数?

結果