App Info : Google Now with Voice Search Working on Android ICS Devices [GUIDE]

Google announced the Android 4.1 (Jelly Bean) at its annual Google I/O conference. Google Now has been one of the major innovations
in Jelly Bean. Thanks to the efforts of XDA Developers for releasing a hacked version of the Google Now APK for Android 4.0 (Ice Cream Sandwich) devices. Unfortunately, the voice search function did not work with the hacked APK. But owing to some more efforts of the developers, the voice search is finally working on devices running on ICS.

"The app will use ICS's voice-to-text engine
to get your answer, and then enter it into the
Google Now v5 app from before. All you have to do is hit enter and then congrats, you've got working voice search!" explains XDA Senior Member SilentStormer on xda developers forum.

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Google Now with Voice Search Working on Android ICS Devices [GUIDE] - International Business Times UK