The KnowBrainer.com YouTube channel http://www.youtube.com/user/KnwBrainer
and TheMicrophoneStore YouTube channel http://www.youtube.com/user/TheMicrophoneStore
are both great resources for video overviews on speech recognition microphones
as well as digital recorders, USB soundcards and software including Dragon
Medical Practice Edition.
You’ll find video overviews on popular wireless, desktop, handheld and
wired headset microphones as well as established companies like Samson and up
and coming companies like SpeechWare.