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attenuation
XDict
n
. 變薄,稀薄化,弄細,衰減
PyDict
變薄,稀薄化,弄細,衰減
Taiwan
MOE
computer
dictionary
(
moecomp
)
attenuation
衰減
ATTEN
Network
Terminology
(
netterm
)
attenuation
衰減
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
attenuation
n
1
:
weakening
in
force
or
intensity
; "
attenuation
in
the
volume
of
the
sound
" [
synonym
: {
attenuation
}, {
fading
}]
2
:
the
property
of
something
that
has
been
weakened
or
reduced
in
thickness
or
density
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Attenuation
\
At
*
ten
`
u
*
a
"
tion
\,
n
. [
L
.
attenuatio
:
cf
.
F
.
att
['
e
]
nuation
.]
1
.
The
act
or
process
of
making
slender
,
or
the
state
of
being
slender
;
emaciation
.
[
1913
Webster
]
2
.
The
act
of
attenuating
;
the
act
of
making
thin
or
less
dense
,
or
of
rarefying
,
as
fluids
or
gases
.
[
1913
Webster
]
3
.
The
process
of
weakening
in
intensity
;
diminution
of
virulence
;
as
,
the
attenuation
of
virus
.
[
1913
Webster
]
The
Free
On
-
line
Dictionary
of
Computing
(
foldoc
)
The
progressive
reduction
in
{
amplitude
}
of
a
signal
as
it
travels
farther
from
the
point
of
origin
.
For
example
,
an
electric
signal
'
s
amplitude
reduces
with
distance
due
to
electrical
{
impedance
}.
Attenuation
is
usually
measured
in
{
decibels
} [
per
metre
?].
Attenuation
does
not
imply
appreciable
modification
of
the
shape
of
the
waveform
(
distortion
),
though
as
the
signal
amplitude
falls
the
{
signal
-
to
-
noise
ratio
}
will
also
fall
unless
the
channel
itself
is
noise
free
or
the
signal
is
amplified
at
some
intermediate
point
(
s
)
along
the
channel
.
["
Networking
Essentials
,
second
edition
",
Microsoft
Corporation
,
pub
.
Microsoft
Press
1997
].
(
2003
-
07
-
29
)
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