iOS Microphone and Speakers problem

When I use a Microphone code in my App, all sounds from "loud speakers" start going only to the "speaker for calling".

Is there any solution?

var mic:Microphone = Microphone.getMicrophone();

mic.gain = 50;
mic.setSilenceLevel(1, 1000);
mic.setUseEchoSuppression(true);
mic.setLoopBack(true);

stage.addEventListener(Event.ENTER_FRAME, onMicStatus);
function onMicStatus(event:Event):void
{
trace (mic.activityLevel);
}