Arbitron (now part of Nielsen)

Arbitron, now part of Nielsen, was a company that measured radio audiences in the United States. It collected data on listeners, such as what they were listening to and when, through methods like surveys and electronic monitoring. This information helped advertisers and radio stations understand audience preferences and improve their programming. By providing insights into listener habits, Arbitron played a crucial role in the radio industry, helping businesses target their advertisements more effectively. In 2013, Arbitron was acquired by Nielsen, a global leader in audience measurement across various media platforms.