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What made the radio important in the 1920s? In the 1920s, radio was able to bridge the divide in American culture from coast to coast. It was more effective than print media at sharing thoughts, culture, language, style, and more. For this reason, the importance of radio was more than just entertainment.

It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.

Radio encouraged the growth of national popular music stars and brought regional sounds to wider audiences. The effects of early radio programs can be felt both in modern popular music and in television programming. The Fairness Doctrine was created to ensure fair coverage of issues over the airwaves.

The BBC has announced its intention to cease AM broadcasting by the end of 2027. The three major commercial broadcasters are also likely to cease all AM broadcasting by the end of 2027, though many independent broadcasters are likely to continue using AM beyond this.

Most AM radio stations are required by the FCC's rules to reduce their power or cease operating at night in order to avoid interference to other AM stations. FCC rules governing the daytime and nighttime operation of AM radio stations are a consequence of the laws of physics.

Automakers, such as BMW, Volkswagen, Mazda and Tesla, are removing AM radios from new electric vehicles because electric engines can interfere with the sound of AM stations. And Ford, one of the nation's top-three auto sellers, is taking a bigger step, eliminating AM from all of its vehicles, electric or gas-operated.

AM has poorer sound quality compared with FM, but is cheaper and can be transmitted over long distances. It has a lower bandwidth so it can have more stations available in any frequency range. FM is less prone to interference than AM. However, FM signals are impacted by physical barriers.

WASHINGTON, D.C. - Certain auto manufacturers are beginning to remove the AM setting from their new electric vehicles because they say electic engines can interfere with the AM stations.

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Radio became a vital link to information and had the power to influence people's opinions in a way that had never been seen before. People could find out what was happening in the world quickly after it happened and it was much faster than waiting for the newspapers to print a story.