Using the Audio Zoom
Focuses the audio recording on a particular area of your choosing; this will increase microphone sensitivity and reduce background noise.
From the Home screen, tap the Apps Key
> Camera 
.Change to video mode, then tap the Settings icon
> Audio
zoom and select On.Tap the Record button
to start recording.Pinch to zoom in a certain area to increase sound sensitivity and decrease noise.
Tap the Stop icon
to stop recording.
NOTE
Do not cover the side microphones while using this feature.
You must record in landscape orientation to use this function.