Hi Arezoo, There are lots of good universities in USA. You can try University of Cincinnati. They have a great program on Computer Science & Engineering. My sister studied Ms. in computer science. She actually got a scholarship and went to USA. Right now, she works for Twitter in San Francisco!!
Uni of Cincinnati does have support for deaf students. For example, You can get head phones in the class so that you can listen to the lecturer's speech directly. Many other universities also provide support to the deaf but you need to talk to the Disability support coordinator as well as the head of the department and you need to tell them what equipment or what kind of support you require.
I also heard Universities in England also have great support for the deaf.
But Universities in Australia is a bit of a disappointment. The course program there is good but the support given to the deaf students is terrible.
Am not sure about Universities in Germany or Sweden. I think it's best that you study in USA. There are lots of Persians and there's a huge deaf community that can help you. Am sure you can also see Googoosh there as well!!:P
Anyways, Wish you good luck and hope you succeed in earning a phd degree. Hope your Arezoo (wish) comes true!
You know Arezoo is a hindi word for wish. I think it has the same meaning in farsi.