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RxBox - EFM Speaker Debugging

RxBox - EFM Speaker Debugging

RxBox, a Telehealth System. Designed to provide better access to life-saving health care services in isolated and disadvantaged communities nationwide.

My role as tech maven was to debug the EFM speaker used for medical screening to get more accurate & reliable audio output.


Shanelle Recheta

March 18, 2021

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  1. IRC Debugging Challenge EFM Audio Amplifier

  2. What is RxBox?

  3. FHR and EFM

  4. TDA2822

  5. The Problem •Distortion at max volume • Inconsistent Output •

    No detectable difference in volume when adjusted
  6. Methodology: Square Wave Testing

  7. Problems Encountered

  8. Solution

  9. Results and Analysis

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  17. Conclusion • Causes distortion • High frequency loss • Poor

    low frequency response and phase shift • Optimal point desired as output for the built-in audio amplifier: 2 Vpp
  18. None
  19. Thank you!