1. Test your microphone and make sure your mic is plugged in and is working. In Test Microphone select the proper microphone device; uncheck the Auto Adjust checkbox and try with increased microphone volume.

2. Check your microphone is not muted or the volume level is not set to minimum.

3. If a particular attendee is not able to hear you, ask him or her to check speakers' volume.

4. If you are an attendee, make sure that the presenter has allowed you mic