Hi Nicola Jones thanks for reaching out. I checked the course, specifically this page and found that all videos have sound. Could you check your end and see if you have your browser volume turned up for the page/tab? If the issue persists, kindly try accessing the course using a different browser (we recommend Google Chrome or Firefox, whichever one you are not already using). If the issue persists after changing browsers, kindly email us at support@openlearning.com so we can assist you further. Thank you.