LG 47LA6200 Owner's Manual page 198

✎ It is recommended you to point the universal remote control towards the set-
top box when you use Voice Mate with it.
✎ When speaking a command, hold the remote within 10cm of your face.
✎ The voice search may fail when you speak too fast or too slow.
✎ The recognition rate of Voice Mate may vary depending on the user's
characteristics (voice, pronunciation, intonation and speed) and the
environment (noise and TV volume).
✎ If your voice is not recognized properly, Voice Mate may function
regardless of your intention.