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Dialing Tone Recognition. Samuel Simmons Justry Weir Eduardo Moya Abubakr Mohamed. Dual Tone Multi Frequency. Theory. Record a series of dialing tones Input signal to Matlab Play sound file Perform FFT Represent signal graphically Output numbers dialed. How it Works. Recording

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Dialing tone recognition l.jpg

Dialing Tone Recognition

Samuel Simmons

Justry Weir

Eduardo Moya

Abubakr Mohamed



Theory l.jpg
Theory

  • Record a series of dialing tones

  • Input signal to Matlab

  • Play sound file

  • Perform FFT

  • Represent signal graphically

  • Output numbers dialed


How it works l.jpg
How it Works

  • Recording

  • Run Program

  • Input file name of recording

  • Program runs / runtime

  • Displays number and graphs


Experimental setup l.jpg
Experimental Setup

  • Hardware

  • Software

  • Types of different sound scenarios


Data results l.jpg
Data Results

  • Higher quality signal with little noise

  • Noise and signal of similar power

  • Poor signal quality with noise




Conclusion l.jpg
Conclusion

  • Equipment

  • Environment

  • Run Time

  • Efficiency


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