Post on 12-Jun-2015
description
SoundOfTheCity
Continuous Noise Monitoring for a Healthy City
SENAmI 2013Lukas Ruge, Bashar Altakrouri,
Andreas Schraderruge@itm.uni-luebeck.de
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Overview
• The problem of noise• The SoundOfTheCity application• Using context in continuous noise measuring• Conclusion
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Noise
• Among the leading causes for illness in urban areas
– Stress – Poor sleep– Reduced life quality– Increased risk for hypertension– Hearing loss – Lower cognitive performance
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Noise Maps
http://www.acoustics.org/press/155th/kaliskisfcagif.jpg
Governments are using Noise-Exposure-Maps to understand the extend of the Problem.
• Calculated• Missing areas• Every few years• Selective sources• Expensive• Commonplace in
the EU, less in theUS
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – The Smart City Approach
• Use available technology– Smart phone as sensor.
• Involve citizens– Everybody can measure.
• Collect and publish data– Make information available.
• Empower citizens– Make government agencies
react.
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – Architecture
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity - Application
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity - Application
Noise Map Sound Map Dosimeter
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – The Noise Map
Visualizing community exposure
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – The Dosimeter
• Measure and visualize how a user is exposed to noise
• Generate personal benefit
• Provide an understanding of the personal exposure
• Provides risk assessment
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – The Sound Map
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – The Sound Map
• The Sound Map provides a dimension that is more easily accessible.
• It allows to capture the experience.• Creating Records
– Video– Sound– Picture– Text
• Augment the information conveyed by the sensor data
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Measuring With Mobile Phones
x dBSPL = 20 log10 (p/p0) dBSPL
SoundOfTheCity is measuring continuous and unobtrusive.Problems:
Handling (hands, pockets, bags)Protective casesWind
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Context Awareness
• Using context can help reduce the amount of distorted measurements and reduce energy consumption
• SoundOfTheCity is supposed to visualize noise that is relevant to the community there are possibilities of exclusion– Phone is in the pocket– User is indoors– User is traveling at high speed
• The measurements are still used to evaluate personal exposure
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Context Awareness
• Is the proximity sensor is evaluating to “true” (Pocket)– Turn of GPS and don’t send noise levels
• Wifi is connected (Indoors)– Turn of GPS and don’t send noise levels
• If GPS-Location has low accuracy (Indoors)– Don’t send noise levels
• If the user is moving at high speed (cars, trains)– Don’t send noise levels
• If the phone has not moved for several minutes– Don’t send noise levels, reduce GPS rate
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Mobile Phones Microphones
The data we get from the microphones is itself already inaccurate.
dB(A)
Hz
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Related Work
• Several projects have attempted to measure noise with mobile phone microphones
• Two systems work on Android– WideNoise [Agr, Casali, Brancotti. 2012]– NoiseTube [Maisonneuve, Stevens, Ochab. 2010]
• NoiseTube: Calibration via profiles for specific phone types
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
9 Requirementsfor Pollution Monitoring Systems for Health1. Personal Exposure2. Community Exposure3. Risk Assesment4. Experience Capture5. Continuity6. Energy Awareness*
7. Correctness*
8. Unobstrusiveness*
9. Context Awareness* * Santini, Ostermaier and Adelmann, On the use of sensor nodes and mobile phones for the assessment of noise pollution levels in urban environments (2009)
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Thank You
We would love if you join us in measuring noise exposure: SoundOfTheCity is avaliable on Goolge Play!
You can also check out the source code at https://bitbucket.org/TVLuke/soundofthecity
http://citysound.itm.uni-luebeck.de
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
SoundOfTheCity – Open API
• SoundOfThe City provides a REST-API– Noise Level Data– Sound Samples
• You can register applications to provide data to our servers
• Additionally the code for SoundOfTheCity is available on bitbucket
• Open API to get noise levels and sound samples
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Stats
Noise measurements 186,564*
Sound samples 238
Downloads from the website 400
Downloads on Google Play ~ 15
Active users 14
Institut of Telematics | Ambient Computing Working GroupSoundOfTheCity
Stats