Turn off "Say OK Google" voice search feature in KitKat

Problem:

I'd like to turn off the "Say OK Google" always-listening voice search feature in KitKat. How can I do so?

Solution:

One way to turn this feature off on the stock version of Android, is to navigate to Settings -> Language&Input -> Voice Search and then uncheck "Hotword detection".

References:

For more information on turning off this always-listening feature in both voice search as well as Google Now, you can check out the more detailed articles below:

• http://www.talkandroid.com/guides/beginner/how-to-turn-off-okay-google-always-listening-feature-in-the-google-experience-launcher/
• http://www.redmondpie.com/how-to-turn-off-ok-google-hotword-detection-in-android-4.4-kitkat/