Progress Report Spirometry Software Group 36 Abby Cohen Team mates: Jessie Butts, Olga Neyman Client: Dr. Klaesner Need 80% of developing countries lack access to spirometry equipment World Health Organization Factors like smoking and use of biomass fuels are increasing prevalence of respiratory diseases The Big Picture Spirometer Hardware Users Laptop Server Record Data Troubleshooting Data Processing Data Analysis Results Audio Sensor Desired CriteriaWeightOmnidirectionalLaptopUnidirectionalDigital Cost< 5$10 0 Frequency Response(0-1kHz) Output TypeAnalog10 0 Operating Temp0~40 C10 Signal-to-noise> 60 dB810n/a109 DirectionalityUnidirectional ShapeCircular810 0 Diameter0.16 cm 1.27 cm Height< 2.5 cm8100 Impedance< 600 75n/a9 Weight< 10 g610n/a10 Current Supply 500 A610n/a100 Sensitivity< -55 dB Total Microphone Omnidirectional vs. Unidirectional Microphone diaphragm reaction depends of direction of sound OmnidirectionalUnidirectional Audio Sensor Desired CriteriaWeightOmnidirectionalLaptopUnidirectionalDigital Cost< 5$10 0 Frequency Response(0-1kHz) Output TypeAnalog10 0 Operating Temp0~40 C10 Signal-to-noise> 60 dB810n/a109 DirectionalityUnidirectional ShapeCircular810 0 Diameter0.16 cm 1.27 cm Height< 2.5 cm8100 Impedance< 600 75n/a9 Weight< 10 g610n/a10 Current Supply 500 A610n/a100 Sensitivity< -55 dB Total Noise Cancellation Hardware Approach Desired CriteriaWeight Microphone Location Microphone Number Pop Filter Analog Accuracy+-3%10786 Cost