Do I need an external microphone?

An external microphone is not strictly required, however for the best accuracy and dictation quality, especially in noisy environments, we recommend a good unidirectional dictation microphone.  

Our recommendations are the Olympus RM-4000P or the Philips Speechmike Premium Touch SMP3700.  This mic is far and away the best option we’ve come across for dictation. Not only do they have terrific noise-canceling capabilities, but they also have built in hotkeys, and a mouse, allowing you to do more with Talkatoo.