First check if the speakers work with the iPad - if you are able to listen to music through the speakers. 

Sometimes the bluetooth speakers may work with an ipad (while playing videos, music etc.) but may not work with Avaz.  

You can try the following options:

  1. First try connecting some other speakers and see if the same problem persists. If it works well, then your speakers may be the problem.  
  2. You can also try Settings > General and check if your Side Switch is set to mute. If it is, slide the switch to turn the sounds back on. 
  3. Reconnect the speakers and try again. 
  4. If that is not the issue, try the always helpful reset - hold the sleep and home button, to shut down the iPad, then restart the iPad and reconnect the speakers and try again.