Eric,
Another part of the experiment may be using your closed window as transducer.. like a pzm microphone .. here is a project of a laser microphone that  looks interesting..
http://www.williamson-labs.com/laser-mic.htm

a video  http://lifehacker.com/292718/build-a-laser-spy-microphone-on-the-cheap



and here a diy pzm microphone   http://www.uwm.edu/~type/audio-reports/BoundaryMicExperiments/L2_PZM_Rig/L2_PZM_Rig.html

regards

federico

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>Being outside also means that exposure to extreme cold, water and ice, and dust could have a negative effect on the operation of the streambox. I suppose this will be a >part of the experiment.

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