Fixing typos in the manual

doc/manual.lyx

@@ -938,7 +938,7 @@ reference "fig:Acoustic-echo-model"
 ), speech from the remote end is played in the local loudspeaker, propagates
  in the room and is captured by the microphone.
  If the audio captured from the microphone is sent directly to the remote
- end, then the remove user hears an echo of his voice.
+ end, then the remote user hears an echo of his voice.
  An acoustic echo canceller is designed to remove the acoustic echo before
  it is sent to the remote end.
  It is important to understand that the echo canceller is meant to improve
@@ -1040,7 +1040,7 @@ Knowing
 \emph on
 how
 \emph default
- to use eacho of the components is not that useful unless we know 
+ to use each of the components is not that useful unless we know 
 \emph on
 where
 \emph default