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Abstract

The complex and dynamic nature of classroom environments often prevents effective and non-obtrusive observation and audiovisual recording of authentic learning activities. In an effort to reduce the complexity of the recording setup and therefore minimize the intrusiveness of the research activity while maintaining reasonable audio quality, we use an array of microphones to record audio from a large portion of the room from a distance. Using the principles of beamforming, we align the recordings from different microphones to amplify the desired signal and diminish unwanted noise, in the process creating and directing a "virtual microphone" within the room.

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