Headsets for your computer, game console or home phone consist of a single earpiece and a microphone. This allows you to communicate with individuals without holding a receiver up to your ear. However, if the microphone is not working there is, more than likely, a problem with the wiring of the equipment. Through a few inspection points you can correct the problem in just a matter of minutes.
Check the cables running from the headset to your computer or device. Many of these devices have both an "Audio In" and "Audio Out" port on the headset. To properly send out signals from the microphone you must connect the equipment into the "Line-In" port.
Clean off the cable connection running from the headset. If the metal connector is dirty you are not going to send or receive clean signals with the equipment.
Inspect the wire that runs from the microphone. Often if the microphone is receiving no signal it is because there is a cut in the wiring. If you find a cut in the wire, wrap the exposed copper with electrical tape.
Check the mute option. If the button is pressed down on the phone that keeps the microphone muted the recipient is not going to hear your audio. Press the "Mute" button to remove the muted feature.