If you just want to record your voice to add audio to your PowerPoint presentations, or perhaps to your lectures, you don’t need to buy much equipment, just an inexpensive microphone and headphones, perhaps a headset mic. You can turn your computer room at home into a decent recording studio by buying a few mobile panes such as the ones used for office cubicles and arranging them around it. You may like to convenience of having a small voice recorder to carry around with you, but our smart phones now do a pretty good job of recording the voice. This is the best online guide I could find for buying audio equipment for recording the voice:
If was put online by someone named Clark who is not related to me. Guide for buying audio equipment: http://www.ljclark.com/audio/audio-01.htm .