Sajda Tilaawat will be performed like a normal Sajda. Wudhu is a condition.
There is no Sajdah Tilaawat when the Aayat of Sajdah is heard on tape.
Face the Qiblah and without raising the hands, recite Takbeer (Allaahu Akbar), going down in the Sajda position. In Sajda, recite Subhaana rabbiyal a'alaa at least 3 times. Thereafter, reciting the Takbeer if you wish to. If you wish, you may arise from the Sajda position into the Tashahhud position. The Sajdah Tilaawat is now complete. There is no need for Salaam.
To say Allahu Akbar both times is Sunnah. Similarly, to stand before and after the Sajdah is Mustahab. (Durre Mukhtar)