title: need an idea to save power consumed by app that do continuous recording
body: <p>I have an application that depends on recording all sounds and analyses it and notify me when it records a specific tone.</p>
  
  <p>So this app consuming battery power as it works all time to detect the sound tone wanted.</p>
  
  <p>I need an idea to prevent this problem please.</p>
  
  <p>Thanks in advance.</p>