Q. I looked at the ZVOX AccuVoice AV52 headphones and love the features and $69 sale price, reduced from $199.99. I have an older Panasonic HDTV. What do I need in order to add Bluetooth so I can send sound to the headphones? My wife is anxious to get good TV sound again, and these headphones with dialogue improvement look like the answer! —R.B., Brookfield, Wisconsin A. You need a Bluetooth transmitter connected to the TV’s optical output. My top recommendation is the $45 Anker Soundsync A3341, which has low latency to avoid lip-sync problems. There are other transmitters available for as low…