All microphones distort the sound of your voice as it's transmitted to the computer, but some mics distort more than others. The microphones included in most speech recognition software packages cost just a few dollars to manufacture and have limited fidelity. Switching to a higher-quality microphone can significantly improve accuracy. Headset mics tend to have a higher accuracy rate than handheld models because they deliver the most consistent sound signal, staying the same place relative to your mouth as you move your head. In noisy environments, such as on an airplane or near an air conditioner, a microphone with active noise cancellation should give improved performance.
Some wireless headsets work by infrared, like a television remote control.
Others work by radio signals, which do not require that you be in sight of your computer and have a wider range. Radio mics are more subject to interference, however, and are typically more expensive as well. Switchboxes enable you to switch your headset from dictation mode to telephone mode. This is a good option if you are frequently on the phone when you work at your computer. Inc. All other trademarks are the property of their respective holders.