[ame]http://www.youtube.com/watch?v=COVxy4hYypw&feature=player_embedded[/ame]
"HD Voice offers an improvement in the sound quality of traditional mobile voice calls due to a wider speech bandwidth of 50-7000 Hz compared to the current narrowband speech codec of 300-3400 Hz. HD Voice uses the WB-AMR (Wideband Adaptive Multi-Rate) speech codec to deliver significantly enhanced sound quality while utilising the same network resources."
50hz eh.
"HD Voice offers an improvement in the sound quality of traditional mobile voice calls due to a wider speech bandwidth of 50-7000 Hz compared to the current narrowband speech codec of 300-3400 Hz. HD Voice uses the WB-AMR (Wideband Adaptive Multi-Rate) speech codec to deliver significantly enhanced sound quality while utilising the same network resources."
50hz eh.