Did You Know Gaming? Forums

In the Famicom version of The Legend of Zelda, a Pols Voice can be defeated by shouting into the built-in microphone. This was referenced in the American manual, but since the NES had no microphone, the game was changed so that arrows were the monster's weakness.

http://www.zeldawiki.org/Pols_Voice

http://www.youtube.com/watch?v=A2UtC_SwAfY