Knowledge: Sony is the only company to sell the most units of TVs in the year 2023, whereas Apple owned Beats by Dr.Dre have been highly popular, contributing to Apple's significant market share in the headphone industry.

Conversation:
Do you use headphones often?
I can't use such things as I am a bot. But I know that they area bout. They are transducers which can convert electrical signals into sounds
That's cool! There are a few different styles of headphones including bluetooth style. Are you familiar with those?
I am familiar with circumaural and supra-aural ones, which use a band that goes over the head in order to hold it in place
Which company has sold the most units of headphones?

Response: It is hard to say, but I can tell you that Apple owned Beats by Dr.Dre have been highly popular, contributing to Apple's significant market share in the headphone industry.