[GingisK]

A TV without a microphone cannot listen in.

You can also put your radio devices in a metal box that electrically seals. (Ammo box)

[billyboy15]

I guess all smart tv are not alike but I have a Samsung with a remote which allows me to “talk” to the TV and find shows, movies etc.

[DJ Frisat]

”A TV without a microphone cannot listen in.”

I wouldn’t state this as an absolute. I’d say that such a set is less likely to ‘listen’, but it can be done. A conventional ‘loudspeaker’ - the device historically used to play audio in televisions, radios, cassette players, etc. - can also be used as an input device, aka a microphone. This may also be the case with newer audio transducer types, but I’m only talking about speakers.

For this to work efficiently, it would require the set to be designed, or modified, to function in a bidirectional mode.

Never say never! 😉