Web Content Accessibility Guidelines (WCAG) 2.0 provide development techniques and tests for supporting deaf and hard of hearing users. (http://www.w3.org/TR/WCAG20/)
- Ensure text or visual alternative is available for audio alerts and sounds.
- Provide text transcript for audio
- Provide captions for audio in synchronized media
- Provide sign language for prerecorded audio in synchronized media
- Turn off sound on your device and ensure you can understand your application’s audio and video.