Acoustic Echo Cancellation(AEC) on mobile with Adobe Flash Builder

It is told that AEC not available on mobile. But I noticed that Adobe Connect application is able to do echo cancellation on ipad.

How that can be possible ?

I tried sdk 4.6 air sdk 3.2 but Microphone.getEnhancedMicrophone() returns null. Microphone.setUseEchoSuppression(true) also doesn't help.

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