However, it would be a great solution for informal real-time communication with a deaf person when an interpreter or a CART writer is not readily available.
If you have an iPhone4S, you could use Siri to try to speak into it. Android devices also have this feature. There’s a Dragon Naturally Speaking application for iPads and older versions of iPhones.
Unfortunately, those applications cannot work in real time. You need to wait until your speech has been recorded and translated into text.
It would be great if deaf people could use speech recognition on their portable device to read what non-signers say in real time. Even if it is not perfect, it would be easier to get a general idea of what is said and to ask a conversation participant to repeat what they said and to speak slower, more clear, louder, or move to a less noisy place.
Are you an engineer interested in implementing those solutions for deaf people to use during their informal conversations with hearing people or are you already working on this idea?