From about 1920 to 1945, radio developed into the first electronic mass medium, monopolizing “the airwaves” and defining, along with newspapers, magazines, and motion pictures, an entire generation of mass culture. About 1945 the appearance of television began to transform radio’s content and role.

2024年12月20日 · Radio technology, transmission and detection of communication signals consisting of electromagnetic waves that travel through the air in a straight line or by reflection from the ionosphere or from a communications satellite. Learn more about the history, development, and principles of radio technology in this article.

2024年12月20日 · Radio technology - Wireless, Broadcasting, Communication: Early in the 19th century, Michael Faraday, an English physicist, demonstrated that an electric current can produce a local magnetic field and that the energy in this field will return to the circuit when the current is stopped or changed.

Radio - Broadcasting, Entertainment, History: The Golden Age of American radio as a creative medium lasted, at best, from 1930 to 1955, with the true peak period being the 1940s.

Golden Age of American radio, period lasting roughly from 1930 through the 1940s, when the medium of commercial broadcast radio grew into the fabric of daily life in the United States, …

As the world moved toward war in the 1930s, radio broadcasting became an element of national war efforts, used both for domestic morale building and especially for international propaganda. The Axis powers adopted radio first and applied it most effectively.

2025年1月24日 · National Public Radio, more commonly known as NPR, is the public radio network of the United States. Based in Washington, D.C., NPR offers a broad range of high-quality news and cultural programming to hundreds of local public radio stations.

Radio - Top 40, Popular Music, Broadcasting: Untouched by World War II, American radio stations rapidly expanded in number to more than 2,000 AM outlets by the early 1950s. Most were in smaller markets gaining local radio service for the first time.

The BBC experimented with local radio in the late 1960s and expanded the number of local stations in the early 1970s. In 1972 the ITA became the Independent Broadcasting Authority (IBA), which assumed responsibility for establishing and regulating independent radio and television stations.

Radio and rock and roll needed each other, and it was their good fortune that they intersected at the exact moment when rock and roll was being born and radio was facing death. Radio had experienced a “Golden Age” since the 1930s, broadcasting popular swing bands and comedy, crime, and drama series.