# Difference between revisions of "Mum's the Word"

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# Description

## Project Overview

Using a simple voice recognition code, this device encodes a vocal password and listens for a match to unlock a door. Using a microphone module of an Arduino, the code records the voice pattern, reduces noise, saves the file, then reads user voice input and compares for a certain percentage match. It is similar to "Knock Knock, Who's There?" except we will be reading an analog signal rather than a digital signal.

## Objectives

During the project, we will try to achieve the following:

• Research and understand current models for simple voice recognition
• Amplification and noise reduction of microphone signal
• Circuitry (microphone, arduino, battery)
• Pattern matching of microphone signals
• LED feedback for successful password match
• If we have time, include a button to allow for resetting the password

## Challenges

We may expect to see the following challenges over the course of this project:

• Successful power supply from battery
• Noise reduction of voice signal
• Obtaining valuable patterns from voice signal
• Comparing patterns in a probabilistic way that allows for error in the password

# Budget

• Microphone module ($10) • Amplifier circuit ($10)
• Arduino ($20) • Battery (+holder) and voltage regulator ($10)
• LEDs ($3) • Switch (for button) ($2)
• Misc ($15) Total:$70