Headphone technology refers to the design and functionality of devices that allow users to listen to audio privately. Headphones convert electrical signals into sound waves, using components like drivers, which are small speakers inside the headphones. There are various types, including over-ear, on-ear, and in-ear headphones, each offering different levels of comfort and sound isolation. Modern headphones often include features such as Bluetooth connectivity for wireless use, noise cancellation to block out external sounds, and built-in microphones for hands-free calling. Advances in technology have also led to improvements in sound quality, battery life, and user controls, enhancing the overall listening experience.