<s>
In	O
signal	O
processing	O
,	O
the	O
high	B-Algorithm
frequency	I-Algorithm
content	I-Algorithm
measure	I-Algorithm
is	O
a	O
simple	O
measure	O
,	O
taken	O
across	O
a	O
signal	O
spectrum	O
(	O
usually	O
a	O
STFT	B-Algorithm
spectrum	O
)	O
,	O
that	O
can	O
be	O
used	O
to	O
characterize	O
the	O
amount	O
of	O
high-frequency	O
content	O
in	O
the	O
signal	O
.	O
</s>
<s>
Thus	O
if	O
X(k )	O
is	O
a	O
discrete	O
spectrum	O
with	O
N	O
unique	O
points	O
,	O
its	O
high	B-Algorithm
frequency	I-Algorithm
content	I-Algorithm
measure	I-Algorithm
is	O
:	O
</s>
<s>
The	O
measure	O
has	O
close	O
similarities	O
to	O
the	O
spectral	B-Algorithm
centroid	I-Algorithm
measure	O
,	O
being	O
essentially	O
the	O
same	O
calculation	O
but	O
without	O
normalization	O
according	O
to	O
overall	O
magnitude	O
.	O
</s>
