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Dialing Tone Recognition

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

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  1. Dialing Tone Recognition Samuel Simmons Justry Weir Eduardo Moya Abubakr Mohamed

  2. Dual Tone Multi Frequency

  3. Theory • Record a series of dialing tones • Input signal to Matlab • Play sound file • Perform FFT • Represent signal graphically • Output numbers dialed

  4. How it Works • Recording • Run Program • Input file name of recording • Program runs / runtime • Displays number and graphs

  5. Experimental Setup • Hardware • Software • Types of different sound scenarios

  6. Data Results • Higher quality signal with little noise • Noise and signal of similar power • Poor signal quality with noise

  7. FFT Plots (Ideal Signal)

  8. Spectrogram (Ideal Signal)

  9. Conclusion • Equipment • Environment • Run Time • Efficiency

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