Asus P5WDG2 WS Professional User Manual page 151

Microphone options
Click the Listening Environment tab allows you to optimize your microphone
input settings.
Enhanced Microphone Features
No Filtering
Enables Noise Filter function. Detects repetitive and stationary noises
like computer fans, air conditioners, and other background noises then
eliminates it in the incoming sudio stream while recording. You can enable
it for a better recording quality.
Voice Recording
Receives only the sound coming from the reception cone and eliminates
interferences including neighboring speakers and reverberations. You can
enable it to transit clearer sound during on-line games, MSN, or Skype.
ASUS P5WDG2 WS Professional/P5WDG2 WS PRO/WiFi-AP 5-27