PREFILTER ATTENUATION VERSUS SAMPLE RATE/BASE FREQUENCY RATIO FOR VARIOUS FILTER ORDERS
	Prefilter order (n)
FS/Fb Ratio	1	2	3	4	5	6
	Prefilter attenuation in decibels
2	0.34	1.22	3.62	7.92	13.38	19.25
3	0.73	4.22	11.99	21.28	30.79	40.33
4	1.22	7.92	19.25	31.24	43.28	55.32
5	1.78	11.36	25.03	38.99	52.97	66.95
6	2.38	14.36	29.77	45.33	60.89	76.45
7	3.00	16.97	33.78	50.68	67.59	84.49
8	3.62	19.25	37.26	55.32	73.38	91.45
9	4.22	21.28	40.33	59.42	78.50	97.58
10	4.82	23.10	43.08	63.08	83.07	103.08
20	9.60	35.12	61.14	87.16	113.18	139.20
50	17.14	51.03	85.01	118.99	152.97	186.95
*Accuracy ratio = 0.99 (1% accuracy)