![](http://www.alamy.com/thumbs/6/FA96A3F3-011B-400F-B17B-A32C37FA0F55/J5FR8F.jpg)
microphone in lecture hall
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Photo credit: © bibop / Alamy / Afripics
License: Royalty Free
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Keywords: audimax, conference, hall, lectern, lecture, meeting, microfon, microphone, session, speech, universitaet, university, vorlesungsraum, vorlesungssaal