By the way, smroot, apologies from straying from your original question but to confirm your observation I am not getting any audio on that feed either.
Just about all the feeds here are operated by volunteers and often times the scanner and PC used to upload the feed are in areas where there is a lot of people movement. A common issue affecting feeds is that someone bumps the volume on the scanner or the audio cable connecting the scanner to the computer pops out. In these types of cases the feeder may not be aware of a problem until someone points it out here.
Hopefully the volunteer who provides this feed will see your post (I am going to ask Jason, the moderator, to move your topic over to a more appropriate forum for you) and correct the problem, especially since there are t-storms moving into that airport's area today, making for exciting listening!