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Nielsen Audio (formerly Arbitron) is a consumer research company in the United States that collects listener data on radio broadcasting audiences. It was founded as the American Research Bureau by Jim Seiler in 1949 and became national by merging with Los Angeles–based Coffin, Cooper, and Clay in the early 1950s. [2]
The A.C. Nielsen company, which continues to measure television ratings today, took over American radio's ratings beginning with the 1949–50 radio season and ending in 1955–56. [40] During this era, nearly all of radio's most popular programs were broadcast on one of three networks: NBC Red, NBC Blue, or CBS' Columbia network.
Nielsen Media Research ( NMR) is an American firm that measures media audiences, including television, radio, theatre, films (via the AMC Theatres MAP program), and newspapers. Headquartered in New York City, it is best known for the Nielsen ratings, an audience measurement system of television viewership that for years has been the deciding ...
Birch ratings. Birch Radio Ratings and BIrch/Scarborough Research, founded by Tom Birch, was a United States media audience measurement service that was founded in 1978 and grew internally and through acquisitions in the 1980s and grew to be a major challenger to once-dominant Arbitron.
The C. E. Hooper Company was an American company which measured radio and television ratings during the Golden Age of Radio. Founded in 1934 by Claude E. Hooper (1898–1954), the company provided information on the most popular radio shows of the era. Claude E. Hooper became well known for his radio audience measurement systems, Hooper Ratings ...
The list is limited to dot-com companies, defined as a company that does the majority of its business on the Internet, with annual revenues exceeding US$1 billion. It excludes Internet service providers or other information technology companies. For a more general list of technology companies, see list of largest technology companies by revenue.
In radio, Numeris is the main provider of ratings services. The company has traditionally used a diary-based system for tracking radio audience habits and this system is still used in most markets. In Montreal, Toronto, Vancouver, Edmonton and Calgary ratings are now measured using the Portable People Meter (PPM) technology. [7]
iHeartRadio (often shortened to just "iHeart") is an American freemium broadcast, podcast and radio streaming platform owned by iHeartMedia. [1] [2] It was founded in August 2008 and iHeartRadio serves as the national umbrella brand for iHeartMedia's radio network, the largest radio broadcaster in the United States with 128 million registered users as of 2019 and its other consumer-facing ...
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