Headphones are used for listening to music and can be plugged into your phone, mp3’s and computers. Many people around the world use these to entertain and even when you’re just bored. They have earbuds which have two strings connected to separate buds. There also are headphones used for the same reason but are made completely differently, these have a wired band which connect bigger “buds” which cover your whole ear and has been said many times that they are supposedly better.
This is related to engineering because it is man-made and made in factories as well, you have to even program some to be eligible to connect to your phone or other devices as Bluetooth. There’s sometimes complex machining and or programming involved in making these just for a singular person to be entertained and pleased.
https://www.techopedia.com/definition/7551/headphones