Here are some options that should help you reconnect to the webinar audio:
1. Reload the room by clicking on the red X in the red circle, in the top right corner of the webinar room.
2. Download the latest adobe flash player update http://get.adobe.com/flashplayer/update/plugin/
3. Load the webinar in a new web browser (Internet Explorer or Chrome work best).
4. Turn off the video feed to enhance the audio feed. To do this, locate the video feed box in the webinar. The top left of the video box will have the presenter’s name. The top right of the box will have an “eyeball” icon. Click that icon to turn off the video (the image will remain black). Turning off video will not turn off the slides or audio, and may conserve bandwidth and enhance your streaming experience. Please note, upon turning off the video, you may experience a temporary loss of audio (the audio will typically come back in about 2 minutes or less).