The term you're looking for is "open" vs. "closed" headphones. "Open" headphones are generally considered to have better sound quality for the price if you're l

The term you're looking for is "open" vs. "closed" headphones. "Open" headphones are generally considered to have better sound quality for the price if you're listening in an empty quiet room, but they a) leak sound to the room b) let sound in from the room