title: How reduce background noise while recording in iphone?
body: <p>I am planning to compare two audio files. i have recorded two voices and compared them using cross correlation. since the presence on background noise while recording the resulting correlation value is always near 0.5.If i give any recorded  waves from internet , i am able to get the correct value. So how can i reduce the background noise while recording.Please guide me .Thanks.</p>
  
  <p>Is there any possibility to reduce noise from the recorded .wav file? </p>