Does anybody here have experience with wireless headphones in a dental office? The application is 7 chairs, each with dedicated TVs. The units they are using now are Bluetooth and have a tendency to interrupt each other where one set of headphones will start listening to another transmitter. Supposedly they were only ever made to have a maximum of 2-3 transmitters in close proximity, which seems to be true for most Bluetooth headphones.

I contacted Sennheiser and was informed that their headphones are limited to 3 transmitters in close proximity. You can use 2 different model numbers for a maximum of 6, but the RS170 models they are recommending are pretty spendy and not a great match for the application (it's actually a kid's dental office so most Sennheisers are too big, particularly the RS170).

His other offices use wired headphones which work fine but he did not wire this office for them because he was confident the technology has matured enough. As a last resort, the office could be wired but he is very hesitant because wired has it's own set of issues plus it would be very labor intensive the way the chairs are located in the middle of the floor.

Anybody with experience along these lines or other solutions?