Podcasts will pose a barrier to individuals who are deaf or hard of hearing unless the information is made available in an accessible format. For audio-only podcasts, consider posting a transcript on your course website; this document will also be of value to students who are not deaf. Podcasts that include video can be captioned. Be sure to make transcriptions and captions available in a timely manner.
Consult with your institution's disability services office for information on how to make your content available in alternate formats. In addition, the following resources provide a good place to start for learning more about how to create accessible podcasts.
-  Making Podcasts Accessible
-  WebAIM's Accessible podcasts thread
-  Accessible Podcatcher