Christopher's Attenuation Page

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2 May 2001

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dB = 10 * log₁₀(P2/P1)
dB = 20 * log₁₀(A2/A1)
dB = 30 * log₁₀(L)

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L = (P2/P1)^(1/3)
L = (A2/A1)^(2/3)
L = 10^(dB/30)

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A2/A1 = (P2/P1)^(1/2)
A2/A1 = (A2/A1)^(2/3)
A2/A1 = 10^(dB/20)

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Bitwise attenuation effects info.

Bits	dB	A2/A1	L
32	193	4e+09	3e+06
31	187	2e+09	2e+06
30	181	1e+09	1e+06
29	175	537e+06	661e+03
28	169	268e+06	416e+03
27	163	134e+06	262e+03
26	157	67e+06	165e+03
25	151	34e+06	104e+03
24	144	17e+06	66e+03
23	138	8e+06	41e+03
22	132	4e+06	26e+03
21	126	2e+06	16e+03
20	120	1e+06	10e+03
19	114	524e+03	7e+03
18	108	262e+03	4e+03
17	102	131e+03	3e+03
16	96	66e+03	2e+03
15	90	33e+03	1e+03
14	84	16e+03	645e+00
13	78	8e+03	406e+00
12	72	4e+03	256e+00
11	66	2e+03	161e+00
10	60	1e+03	102e+00
9	54	512e+00	64e+00
8	48	256e+00	40e+00
7	42	128e+00	25e+00
6	36	64e+00	16e+00
5	30	32e+00	10e+00
4	24	16e+00	6e+00
3	18	8e+00	4e+00
2	12	4e+00	3e+00
1	6	2e+00	2e+00
0	0	1e+00	1e+00
-1	-6	500e-03	630e-03
-2	-12	250e-03	397e-03
-3	-18	125e-03	250e-03
-4	-24	62e-03	157e-03
-5	-30	31e-03	99e-03
-6	-36	16e-03	63e-03
-7	-42	8e-03	39e-03
-8	-48	4e-03	25e-03
-9	-54	2e-03	16e-03
-10	-60	977e-06	10e-03
-11	-66	488e-06	6e-03
-12	-72	244e-06	4e-03
-13	-78	122e-06	2e-03
-14	-84	61e-06	2e-03
-15	-90	31e-06	977e-06
-16	-96	15e-06	615e-06
-17	-102	8e-06	388e-06
-18	-108	4e-06	244e-06
-19	-114	2e-06	154e-06
-20	-120	954e-09	97e-06
-21	-126	477e-09	61e-06
-22	-132	238e-09	38e-06
-23	-138	119e-09	24e-06
-24	-144	60e-09	15e-06
-25	-151	30e-09	10e-06
-26	-157	15e-09	6e-06
-27	-163	7e-09	4e-06
-28	-169	4e-09	2e-06
-29	-175	2e-09	2e-06
-30	-181	931e-12	954e-09
-31	-187	466e-12	601e-09
-32	-193	233e-12	378e-09

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