Design Specifications
- Adjustable flow ≥ 10-15 LPM (Smiths Medical)
- Humidification 100% at 32 C (> 33mg H20/ L air) (NIH, Covidien)
- Air temperature 32°C - 37 °C
- Battery life ≥ 5 hours
- Signal to Noise Ratio (SNR)* > 10 dB
- Personalized patient on/off control
- Facilitator control to adjust flow between 10-15 LPM
- Adaptive control scheme with 90% accuracy
- Size < (30 cm x 25 cm x 20 cm) (Philips Respironics)
- Weight < 5 kg (Philips Respironics)
- Output diameter = 22 mm (Teleflex)
- Air filter life = 15-30 days (Philips Respironics)
- Water resistant at 1 atmospheric pressure (Casio)
- Withstand bumps with speed of 1.5 m/s and drops from 1m
- Must not interfere with the user's respiratory system
* Signal to Noise Ratio (SNR) is a measure that compares produced speech to produced noise using Sound (dB)-Noise(dB). For an individual with normal hearing, an SNR of 10 dB corresponds to intelligible speech (Hound Dog Hearing).