Stuttering
- Affects approximately 2.5-3 million individuals in the US
- Can range from mild and annoying to sever and debilitating
- Different from other speech disorders in that individuals who stutter can become fluent.
Treatments
- Medically- expensive, potential side effects
First Prototype - Therapy- variable success, periodic retraining is recommended
- Auditory feedback-dramatic response for some patients, devices should not draw attention to user.
Our Prototype
- Delayed Auditory Feedback (DAF)
-programmable delay, 0 to 150 ms - Frequency Altered Feedback (FAF)
-programmable shift, -250 to 500 Hz - Any Combination of DAF and FAF
Prototype Electronics
- Microphone interface
-ac coupled, riding on 2.5v reference - Switched capacitor anti-aliasing filter
-low-pass, 3.0 kHz - Mitsubishi M16C/62 5v
-16 MHz clock, 14kHz sampling rate, 8 bits - Switched capacitor smoothing filter
- Speaker attenuator/ diver
M16C Breadboard
Second Prototype
I/O
Functional Diagram