Voice Decoder System for Vowels

http://people.ece.cornell.edu/....land/courses/ece4760
We created a smart voice decoder system that is capable of recognizing vowels in human speech. The audio input is sampled through a microphone/amplifier circuit and analyzed in real time using the Mega644 MCU. The user can record and analyze his/her speech using both hardware buttons and custom commands through PuTTY. In addition, the final product also supports a simple voice password system where the user can set a sequence of vowels as password to protect a message via PuTTY. The message can be decoded by repeating the same sequence via the microphone.