19.05.12
Here's an overview of the different types of microphones you can use with speech recognition software, how they work, and what might be the best mic for the way you work.
Three types of microphones
There are three types of microphones that you can use with speech recognition software. The most common type of microphone is a USB headset. Nuance includes one of these with boxed versions of Dragon Dictate. While the headset they provide is acceptable, there are many headsets that are much better.
The second type of microphone is wireless. There are two technologies for wireless: Bluetooth and DECT . Each offer different advantages and disadvantages.
Finally, you can use a desktop microphone, which allows you to work without wires or without wearing the mic. (Technically, you can use your Mac's internal microphone, or the one in your monitor if you use an Apple display, but this won't give you the best results with speech recognition software.)
Good headsets may cost more than the actual speech recognition software you use, but if you plan to spend a lot of time dictating, the amount of time you save using speech recognition software ensures that this investment will pay for itself very quickly.
Source: Macworld