Bob has a pair of headphones that he loves and and older receiver. He would like to convert them to bluetooth. Leo says it can be done with a bluetooth transceiver. They come out of China and aren't very expensive. Rocketfish makes one. OroTech. You can easily get one for under $100 or even $50. You'll want one that plugs into the optical audio out to keep it digital for the least signal degradation. You'll also want the A2DP standard.
Mike just bought a Sony Bluetooth over the ear headphone set. Can he use it with his television? Leo says he can get a Bluetooth transmitter, and if his TV has a headphone jack, he can just plug it in and then pair that to his headphones. He should look for A2DP because that has the best quality audio. Analog could cause a bit of delay, though. That's why keeping it digital is important. If there is delay, Mike can possibly adjust it in his TVs audio settings.