People who do not want to disturb sleeping family members could use a new product from Panasonic that does not need speakers or even your own ears: wireless bone-conduction headphones.
The headphones connect to a TV via the Bluetooth wireless standard and attach to your head like a normal set of headphones.
But instead of using your ears, the headphones work like hearing aids by transmitting sound waves through your skull.
They were one of several innovations Panasonic unveiled at the International CES show in Las Vegas.
It also showed off a new user interface for its Smart Viera TVs, featuring a TV-mounted camera that recognises the user and sets viewing preferences accordingly.
The Japanese electronics maker also showed off an easy way to send YouTube videos from smartphones to the TV.