I did 3 test recordings… handheld, spoken into the front (buttons/screen) side… handheld, spoken into the back (clip) side… table placed, spoken into the front side. Handheld were 12-15 in. from my mouth, table-placed, about 20 inches.
Front side: noticeable but not intrusive condenser mic bass boost (proximity effect). Adequate overall voice frequency response, but with slightly muffled treble response.
Back side: more pronouned bass boost. Way more pronounced muffled-ness (less treble response).
Table-placed: ok bass, pronounced treble response. For my (amateur) voice, would need a de-esser to cut sibilants.
The same results (with far higher volume) with Cool Edit noise reduction + voice compressor (amplitude transform) + normalization to 95%.
I’m thinking that when it’s placed face-up on a table surface, the little thing becomes a type of pressure-zone microphone http://en.wikipedia.org/wiki/PZM_(microphone)