Ok Google’ has been the hotword recently popular because the new Android KitKat OS in Nexus 5 comes with the voice recognition where saying those two words would activate the responder and that would listen to you. It’s something that would be activated all the time and be ready to listen to you whenever the phone screen is turned on. It doesn’t do much like the Moto X which actually gets activated even when the screen is turned off and locked. Still, the Nexus 5 and Android 4.4 combination listens to you wherever you are with an active screen.This one came as a latest Google Now update in the earlier OS versions too, but in the Google Experience Launcher in KitKat, there is a different mechanism where there is always a partial wavelock on the Kernel, and that would drain the battery unnecessary because not just the OS is active at that time, but the microphone too would be ready to listen to your command, although you might choose to talk something.
The only wise option when you are not actually trying to send any voice commands or searches, is to turn the ‘Ok Google’ hotword feature. Here’s how you can do that in the Google Experience Launcher. But do keep in mind, there is no separate option to keep this activated on Google Now and deactivate it on the Experience launcher, as once you deactivate this, it won’t work on both the places.
Turn off “Ok Google” in Android 4.4 KitKatTo do this, you need to tap and hold any home screen or launcher page, so that it shows up a few options in which you need to tap “Settings”.
Here, go to Voice and uncheck the option “Hotword Detection”. This would turn off the Ok Google feature and this would be turned off on both the Experience launcher and the Google Now.