Overview of Earbuds A brief overview of the most popular type of headphones. Earbuds, also known as in-ears or earbuds, are small ear-cases that contain speakers and a microphone. They have become increasingly popular due to their convenience, portability, and affordability. With numerous brands offering various models, it can be challenging to choose the right pair for your needs. However, understanding the key features of earbuds will help you make an informed decision.