What is the range of commercial AM broadcast bands?

FM radio stations are usually assigned a frequency in the range of 88 to 108 MHz in contrast to AM radio which is in the range of 0.55 to 1.6 MHz, and this is one reason why AM radio has a longer range; however, FM radio operates better in reception areas that are closed in, such as tunnels and buildings, owing to the …

What is radio’s role in American society at the current time?

In addition to serving as the lifeblood of emergency communication, they also provide jobs and play a day-to-day role in the lives their communities. Local radio is most important to local communities for more than just emergency announcements and communication during disasters.

Which of the following band is used for FM radio broadcasting?

FM radio uses frequency modulation, of course. The frequency band for FM radio is about 88 to 108 MHz. The information signal is music and voice which falls in the audio spectrum. The full audio spectrum ranges form 20 to 20,000 Hz, but FM radio limits the upper modulating frequency to 15 kHz (cf.

When was the first commercial radio broadcast?

November 2, 1920
On November 2, 1920, station KDKA made the nation’s first commercial broadcast (a term coined by Conrad himself). They chose that date because it was election day, and the power of radio was proven when people could hear the results of the Harding-Cox presidential race before they read about it in the newspaper.

What is AM radio used for?

In many countries, AM radio stations are known as “mediumwave” stations. They are also sometimes referred to as “standard broadcast stations” because AM was the first form used to transmit broadcast radio signals to the public.

What is the role of radio in rural development?

Purpose: Radio has formed a key component in improving agricultural production by creating awareness among farmers about agricultural information and the availability of markets for their produce. The study employed expert interviews, questionnaires and semi-structured interviews for the farmers.

How does radio affect society?

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.

Who invented the FM band?

Edwin Howard Armstrong
FM broadcasting/Inventors

It may seem old hat today, but in 1933, American electrical engineer Edwin Armstrong changed modern communication forever when he invented something called wide-band frequency modulation—or FM radio. Armstrong was a native of New York City, as he was born there in 1890.

Who invented commercial radio broadcasting?

Shortly after the 1900s, Marconi held the patent rights for radio. Marconi would go on to win the Nobel Prize in Physics in 1909 and be more successful than any other inventor in his ability to commercialize radio and its associated equipment into a global business.