2. UCF Noise Map, an Android Application Project Presentation Cindy Atherton and Deepa Shinde

3. Topics Project Plan Introduction to Sound Pressure Level(SPL) Mobile splMeter App ◦Capturing SPL ◦Viewing the Map Server Side Processing ◦Using Microsoft MapPoint ◦Hosting the web page Conclusions and Future Work

4. Project Plan Provide an Android Emulator app that enables clients to contribute data and download a map from the server: Client-server communication in Android Emulator will illustrate network communications Clients will have the ability to capture sound files and process intensity levels (in decibels) showing how Android handles file and sound processing and how the Emulator simulates sound sensors Clients can view temporal maps of noise Server compiles and stores data as well as produces temporal maps from the client data Maps display noise levels as temporal distribution by displaying the areas on the map based on color-coded sound level intensity scale

5. Introduction to Sound Pressure Level

6. Definitions Sound pressure is the local pressure deviation from the ambient (average, or equilibrium) pressure caused by a sound wave. Sound pressure level (SPL) is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. SPL is measured in decibels (dB) above a standard reference level.

7. SPL Computation The decibel expresses the level of a given sound in terms of the ratio of the mean- square pressure of the sound to a reference mean-square pressure. ◦p ref is the standardized reference pressure ◦p rms is the rms (root-mean-square) pressure of the sound under consideration

8. Sound Levels http://www.mallory-sonalert.com/Articles/TechAppGuides/Decibel Sound Level Scale.pdf

9. Mobile splMeter App

10. The splMeter Android App

11. Modified from original splMeter http://code.google.com/p/splmeter SPL Meter is a Software Based Sound Pressure Level Meter that runs in android OS. Copyright (C) 2009 Hashir N A hashir@mobware4u.com hashir@mobware4u.com

12. User Activities GUI Contribute Reading View Map

13. Contributing Readings Contribute Reading Start Listening Submit Reading Record & Calculate SPL Write text file to SD card

14. Contributing Readings

15. Viewing the Map View Map Access website Download map in GIF format Display map

16. Viewing the Map

17. Server Side Processing

18. Reasons for using MapPoint Very simple to use Readily available via the MSDN Academic Alliance (Free) Accepts text files as input to update existing map (no need to parse files) Enables users to create their own custom data ranges and corresponding visual representations Outputs images in GIF format, which is supported by Android Exports maps as HTML files

19. Test Data LatitudeLongitudeDecibels 28.600523-81.197916110 28.601936-81.200405150 28.602922-81.19850570 28.602235 -81.19970620 28.601547-81.20070465 28.600954-81.19936365 28.600605-81.19921365 28.600681 -81.19907340 28.601293-81.19906290 28.600916-81.19777538 28.600106-81.20146660 28.601170-81.20149880 28.602875-81.20107950 28.604608-81.19876220 28.603751-81.20045770

20. Server Side: Microsoft MapPoint

21. Custom Data Ranges

22. Server Side: UCF Noise Map Site http://www.cs.ucf.edu/~catherto/UCF%20Noise%20Map.htm

23. Conclusions and Future Work The splMeter App currently ◦Runs on the Android Emulator ◦Allows users to contribute SPL readings ◦Allows users to view a current noise map of the UCF campus Drawbacks ◦The Emulator has no GPS location sensor, the latitude and longitude had to be hardcoded ◦Input to MapPoint and upload of the HTML file to the Internet are done manually To Do ◦We are investigating writing an application in Visual Basic that will automate processing on the server side ◦Finish paper ◦Clean up code and GUI