1. Wireless Man-Machine Communication Meredith Grow Alencia Woodard Advised by: Richard Fries

2. Operating Room Concentration required Passage of critical information Surgery may last for hours

3. Problem Noisy environment 80db of noise accumulated  machines  conversation between OR staff  phones, pagers, music, etc. Neglect of monitoring equipment Conversation Scheduled breaks Shift changes

4. Objective Device Connected to the patient monitor through a wireless headset Allows the clinician to listen to mixed audible information  (tone, voice, messages, etc.) Design Work environment  background noise  electrical interference  cross talk Anticipated information  Pulse  Heart rate  Blood pressure  0 2 saturation

5. Progress Patent search completed Radio headset Football amplification system No device found to receive signal and produce varying audible sounds Literature review completed Material provided by advisor Demands/Wishes Completed Revised budget

6. Demands ParameterHigh Priority Medium Priority Low Priority Number of pulses in a burst531 Pulse frequency150 –1,000 Hz Number of harmonic components in the range 300 Hz to 4,000 Hz Minimum 4 44 Effective purse duration (t d )150 – 200 msec 150 - 200 msec Rise time10 - 20% of t d Fall time10 - 20% of t d Amplitude45 - 85 db

7. Demands (cont.) Can not interfere with function of OR equipment Safe for user and patient monitor Must overcome background noise, electrical interference and cross talk

8. Wishes Cost effective Light weight Conveniently carried User friendly

9. Current Work Signal capture Circuit – headset interface Arrange meeting with Vanderbilt anesthesiologist Arrange meeting with EECE graduate student

10. Future Work Circuit design Computer simulation Testing Create poster presentation