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Four recorder types were tested. Each test took place in the Boeing Auditorium in the FXB Building at the University of Michigan (http://inst-tech.engin.umich.edu/facilities/detail.php?roomid=37)
The four recorders were:
Sony ICD-P520 (Voice Recorder)
(http://www.circuitcity.com/ssm/Sony-ICD-P520-Digital-Voice-Recorder-ICD-P520/sem/rpsm/oid/171878/catOid/-13173/rpem/ccd/productDetail.do)
Olympus VN-2100PC (Voice Recorder)
(http://www.amazon.com/Olympus-VN2100PC-Digital-Voice-Recorder/dp/B000I3C6CE/ref=pd_bbs_1/102-7399024-5387367?ie=UTF8&s=electronics&qid=1179450159&sr=8-1)
Olympus DM-20 (Voice Recorder)
(http://www.olympusamerica.com/cpg_section/product.asp?product=921)
Canon Optura 60 (Video Camera)
(http://www.amazon.com/Canon-Optura-MiniDV-Camcorder-Optical/dp/B0007W2H48)
The first series of tests was done with the voice recorders placed on the floor in the center of the stage. The Optura 60 was placed slightly in the audience to record a sample powerpoint slide.
The second series of tests ( - Lecturn added to the file name) was with the recorders sitting on the lecturn. For this test, the speaker walked around the perimeter of the room.