<s>
The	O
lip-ribbon	B-Algorithm
microphone	I-Algorithm
(	O
also	O
known	O
as	O
the	O
"	O
commentator	O
's	O
lip	O
"	O
microphone	O
)	O
is	O
a	O
type	O
of	O
ribbon	B-Algorithm
microphone	I-Algorithm
designed	O
specially	O
for	O
use	O
by	O
live	O
news	O
reporters	O
or	O
sports	O
commentators	O
.	O
</s>
<s>
Organisations	O
such	O
as	O
the	O
BBC	O
,	O
CBS	O
and	O
ABC	O
use	O
lip-ribbon	B-Algorithm
microphones	I-Algorithm
to	O
cover	O
events	O
including	O
motor	O
racing	O
,	O
wrestling	O
,	O
processions	O
and	O
demonstrations	O
.	O
</s>
<s>
Lip-ribbon	B-Algorithm
microphones	I-Algorithm
use	O
baffles	O
to	O
create	O
an	O
acoustic	O
labyrinth	O
within	O
the	O
body	O
of	O
the	O
microphone	O
.	O
</s>
<s>
The	O
labyrinth	O
design	O
also	O
allows	O
lip-ribbon	B-Algorithm
microphones	I-Algorithm
to	O
withstand	O
wind	O
speeds	O
of	O
up	O
to	O
without	O
affecting	O
speech	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
this	O
,	O
many	O
lip-ribbon	B-Algorithm
microphones	I-Algorithm
use	O
a	O
fixed	O
mouth	O
guard	O
to	O
ensure	O
a	O
distance	O
of	O
between	O
source	O
and	O
microphone	O
.	O
</s>
<s>
Lip-ribbon	B-Algorithm
microphones	I-Algorithm
are	O
more	O
efficient	O
at	O
noise	O
reduction	O
at	O
lower	O
frequencies	O
.	O
</s>
<s>
Lip-ribbon	B-Algorithm
microphones	I-Algorithm
 '	O
response	O
will	O
often	O
not	O
be	O
much	O
higher	O
than	O
10kHz	O
,	O
which	O
is	O
sufficient	O
in	O
the	O
speaking	O
voice	O
applications	O
for	O
which	O
it	O
is	O
normally	O
used	O
.	O
</s>
