<s>
The	O
sending	B-Algorithm
loudness	I-Algorithm
rating	I-Algorithm
(	O
SLR	O
)	O
is	O
a	O
measure	O
of	O
the	O
loudness	O
of	O
the	O
transmit	O
audio	O
sent	O
through	O
the	O
microphone	B-Application
of	O
a	O
communication	O
device	O
(	O
for	O
example	O
,	O
a	O
mobile	O
phone	O
)	O
It	O
compares	O
the	O
Sound	O
intensity	O
of	O
the	O
sound	O
waves	O
into	O
the	O
microphone	B-Application
to	O
the	O
resulting	O
audio	O
signal	O
.	O
</s>
<s>
ITU-T	O
recommendation	O
P.79	O
has	O
the	O
frequency	O
weighted	O
sensitivity	O
calculations	O
in	O
it	O
for	O
sending	B-Algorithm
loudness	I-Algorithm
rating	I-Algorithm
(	O
SLR	O
)	O
and	O
receive	O
loudness	O
rating	O
(	O
RLR	O
)	O
for	O
telephony	O
.	O
</s>
