noisetube project
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Participatory sensingThe NoiseTube project
Nicolas Maisonneuve, Associate Researcher, SONY CSL Paris
Issue 1: Scarcity of fine-grained data
Issue 2: Limited role of citizens
Environmental management
Change of paradigm in environmental data productionCitizens in the loopChange of paradigm in environmental data productionCitizens in the loop
Environmental/ health Sciences
Social/political sciences
Participatory sensing
Research
Data gathering: a general problem
Water: limited accurate info on water and treatment systemsWater: limited accurate info on water and treatment systems
Food: Agricultural statistics deteriorated over timeFood: Agricultural statistics deteriorated over time
Health: uncertainty in exposure assessmentHealth: uncertainty in exposure assessment
[Poor data, weak agencies hamstring U.N. environmental oversight, NY Times, 2009]
[FAO, Audit 2009][Uncertainty and Data Quality in Exposure Assessment, WHO, 2008]
Poor system of monitoring
Why do we need to involve citizens?
“Environmental issues are best handled with the participation of all concerned citizens..” [Principle 10, Rio Declaration, 1992]
But, in reality.. no real participation despite international agreements
Environmental issues = anthropogenic effect
Involvement change of behavior
Opportunity for Participatory Sensing
Empowerment in the digital world
Growing public concern
+ + Democratization of powerful
& sensor-rich phones
New usage of phonephone = personal measurement instrument
Individual level : new user experienceAutonomy to measure local phenomenaNew form of expression/collaboration
Collective level: adaptative sensor network with a limited cost
New usage of phonephone = personal measurement instrument
Individual level : new user experienceAutonomy to measure local phenomenaNew form of expression/collaboration
Collective level: adaptative sensor network with a limited cost
Case study: noise pollution monitoring in EU
EU countries
Health: 170 Million citizens impactedEconomical cost: €12 billion
issues Limited modeling Lack of observation Emission vs exposure
EU Call for real data! “Goals for future research include supplying the missing data.” [EC, 2004] “Every effort should be made to obtain accurate real data“ [EC WG, 2006]
No real exposure data at the individual level
Reality Noise map simulation
VS.
Participatory monitoring of noise pollution using mobile phoneswww.noisetube.net
Goal: Enabling citizens to measure and tag their everyday exposure to inform the community by: supplying real exposure data building a collaborative exposure map of their environment
Goal: Enabling citizens to measure and tag their everyday exposure to inform the community by: supplying real exposure data building a collaborative exposure map of their environment
How does it work?
Human-based sensingHuman-based sensing
No sound sent, only exposure User Privacy, user experience, Scalability
• LAeq(1s) computation (SP)
• Exposure Pattern recognition
sensors (microphone, gps) computer+
Phone-based sensingPhone-based sensing
free tagging of exposure
Diffusion of Raw exposure data
Bi-directional service
Collaborative exposure mapNoiseTube serve Public data commons
Data postprocessing (GIS)Gis server
But, what about the accuracy?
Real-world experimentExperiment In lab
Person equipped with sensors Phone + hand free kit
Professional sensors
?=
Virtual noise sensor =microphone + software
Sound Level Meter (200$)
Collaboration with
After correction: error 2 db
But, what about the accuracy?
?=
Virtual noise sensor =microphone + software
Sound Level Meter (200$)
Real-world experimentExperiment In lab
Phone in Hand Hand free kit Phone in pocket
+/- 2,5 db +/- 4,5 db +/- 6,5 db
correction in lab
phonecorrection
dB
dB
And measuring is not enough..
Hazard identification issues Difficult to identify & separate noise sources from exposure recordings
Opportunity: tagging exposure
which source generated these levels?
Noise mapSound level meter
map with a semantic layer
People are excellent at recognizing noise sources
Using people as sensors to tag the source of their exposures (and thus inform the community)
Real-time collective exposure
Simple visualisations for citizens/ police makers
•Exposure layer•Semantic layer •Contextual information •Real-time
Data aggregation by small piece of street
Connected to the web ecosystem
Data commons accessible via public web API (GeoRSS, JSON) (e.g. tracking new data in an area)
Connected to the people
Real-time spreading of environmental information through social network service
Enhancing the conversation & dissemination (push)
Multiple ways to diffusion information (in progress)
SMS
Empowerment - case study 1: Subway in Paris
Location of the lines reconstructed afterwards (no GPS) (+ PlaceEngine?)
No public information about noise in the subway(private data owned by the RATP company)
(2008)
Empowerment - case study 2: Mumbai, India (2009)
Collaboration with NGO Awaaz Foundation organizing a campaign to raise awareness and map Mumbai, (end of september)
(need to adapt the application to the indian phone market)
3rd most noisy city in the world
AFP news
vsMake it real (for real world
experimentation)
• No need new device: Recycling phone• 1st project accessible to the public (June)• 1st subway noise map
Data collected • Personal and geolocated exposure data
(epidemiological studies)• Human-based sensing
Visualization & Sharing• Data aggregation by urban element• (future) pollution information spreaded
via social networks (twitter)
Make it real (for real world experimentation)
• No need new device: Recycling phone• 1st project accessible to the public (June)• 1st subway noise map
Data collected • Personal and geolocated exposure data
(epidemiological studies)• Human-based sensing
Visualization & Sharing• Data aggregation by urban element• (future) pollution information spreaded
via social networks (twitter)
Related projects for air pollution
« sensing atmosphere (taxi driver) Berkeley, 2007
Noisetube
“Mobile Urban Sensing project” Cambridge, 2008
« street sweeper »,Berkeley, 2008
Conclusion
Thanks for your attentionAny question?
Nicolas Maisonneuve
www.noisetube.net