.
10.
Appendix
The
following
table
is
given
in
order
to
facilitate
the
conversion
from
dB
to
a (voltage)
ratio.
It
is
used
as
follows:
Subtract
a
whole
number
of
n X
20
from
the
dB
value
to
he
converted
·
which
gives
a
positive
remainder
between
0
and
20.
Look
up
the
ratio
in
the
table
corresponding
to
the
remainder.
The
value
sought
is
then
to-
X
value
from
the
table.
Example:
Convert
65.3
dB
re.
1 g
into
units
of
g.
65.3 =
(3)
.X
20
+ 5.3.
5.3
gives
from
table
1.841.
The
g-value
is
then
lOS
:x 1.841 = 1841 g.
With
negative
values
the
procedure
is
the
same,
e.g.:
64
Convert
-31.8
dB
re.
1 g
into
units
of
g.
-31.8
=
(-2)
X
20
+ 8.2.
8.2
gives
from
table
2.570.
The
g-value
is
then
10-2 X 2.570 = o.02570
g.
Table
for
Converting
Decibels
into
(Voltage)
Ratio.
dB
I
.0
I
.1
I
.2
I
.3
I
.4
I
.5
I
.6
I
.7
I
.8
I
.9
0
1.000
1.012 11.023
1.035 l t.o4 7 1.059 11.072
1.084:
11.096
1.109
1 1.122 1.135 1.148
1.161
11.175 1.189 1 1.202
1.216 11.230
1.245
2 1.259 1.274 1.288
1.303 1.318 1.334 1.349
1.365 1.380 1.396
3 1.413
1.429
1.445 1.462 1.479 1.496
1.514 1.531 1.549 1.567
4
1.585
1.603 1.622 1.641
1.660
1.679
1.698 1.718
1.738
1.758
5
1.778 1.799
1.820 1.841 1.862 1.884 1.905 1.928
1.950 1.972
6
1.995
2.018
2.042 2.065 2.089
2.113 2.138 2.163
2.188 2.213
7 2.239 2.265 2.291 2.317 2.344 2.371 2.399 2.427
2.455 2.483
8
2.512
2.541
2.570 2.600
2.630
2.661
2.692
2.723 2.754 2.786
9
2.818
2.851 2.884 . 2.9'17 2.951 2.985
3.020
3.055
3.090
3.126
10
3.162 3.199
3.236
3.273 3.311 3.350 3.388 3.428
3.467
3.508
11
3.548 3.589 3.631 3.673
3.715
3.758 3.802
3.846
3.890 3.936
12
3.981
4.027 4.074
4.121
4.169 4.217 4.266 4.315
4.365 4.416
13 4.467
4.519 4.571
4.62-l 4.677
4.732
4.786 4.842
4.898 4.955
14
5.012 5.070 5.129
5.188 5.248
5.309
5.370
5.433
5.495 5.559
15
5.623 5.689 5.754
5.821
5.888
5.957
6.026 6.095
6.166 6.237
16
6.310
6.383
6.457
6.531 6.607
6.683 6.761 6.839 6.918 6.998
17
I 7.079 I 7.161
7.244 17.328
7.413
7.499 7.586
7.674
7.762 17.852
18
7.94:3
8.035 8.128 8.222 8.318
8.414 8.511
8.610 8.710 8.810
19
I 8.913
1
9.016
9.120
9.226 9.333
9.441
9.550
9.661 9.772 9.886
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