..skip the iPhone as a middleman, and use a wireless bluetooth transmitter?
http://www.telme2.com/webshop/index.php?id_product=8&controller=product
This device plugs into the digital optical output behind the HDTV, or possibly, cable or sat box.
Lots of us who are hard of hearing would like to listen to TV audio through our iPhones. We could use ear pods or new iPhone connected hearing aids and control the volume from our iPhones. What can we use to transmit the TV audio output to the iPhone via wifi or bluetooth? Can we hard wire it through a black box?

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