AM vs FM Radio Essay example

AM vs FM Radio Essay example

Length: 963 words (2.8 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview


In modern society, radio is the most widely used medium of broadcasting and electronic communication. Radio can be broadcasted with both microwaves and longer radio waves. These are transmitted in two ways: amplitude modulation (AM) and frequency modulation (FM). Amplitude radio is created by combining a sound wave from a microphone, tape, record, or CD with a "carrier" radio wave. This results in a wave that transmits voice or programming as its amplitude (intensity) increases and decreases. Frequency modulation conveys information, voice, and music on a radio wave is to slightly change, or modulate, the frequency. One big advantage of frequency modulation is that it is static free.
AM radio works by changing the amplitude of the carrier wave and FM radio works by changing the frequency of the carrier wave.
In amplitude modulation the amplitude of a carrier wave on one specific frequency is modified. The antenna sends out two kinds of Am waves: ground waves and sky waves. From the antenna ground waves spread out horizontally and they travel through the air along the earth's surface. On the other hand sky waves spread up into the sky. When these waves reach the ionosphere, they may be reflected back to earth. This reflection enables AM radio waves to be received at great distances from the antenna.

From this picture it is evident that ground waves don't go very far. This means numerous stations can be put on the same frequency without interfering with each other — assuming they are far enough apart. Problems found are that sky waves can end up in other states, provinces, or even in other countries.
FM Radio waves also go horizontally along the ground and skyward. However, due to the higher frequency of the carrier w...


... middle of paper ...


...band.
Hetrodyning is a method of transferring a broadcast signal from a carrier to a fixed frequency in a reciever so most of the reciever does not have to be returned when you change the channel/station on the radio. A superhetrodyne reciever is fitted to most modern radios in order to use the method of hetrodyning. Hetrodyning is used with AM and FM radio to ensure a more convenient and efficient experience.
There are many differences between AM and FM radio such as AM has the capability to have a larger number of channels but has not got the best quality. FM does not have the same capability of the number of channels but the space between the channels is much wider which makes the quality much better. Although FM radio is limited to 100 radio channels this is made up for in the quality of the radio broadcasted and is therefore the better option.
Lee Wilson

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Radio Frequency Emissions Essay

- One late summer evening I was watching the Late Night with Jimmy Fallon. If you are a frequent viewer of Late Night, infomercials account for the majority of the advertising. To this day, I remember Safe Cell Tab being advertised as a sticker-like device that would reduce the risk of cancer when using it with a wireless phone. According to Wikipedia, sixty percent of the world’s population owns a cell phone. There are roughly 6.7 billion people in the world. This means on any given day 4 billion people are exposed to cellular phones....   [tags: Radio Waves]

Better Essays
740 words (2.1 pages)

The Symbolic Meaning of the Radio in The Enormous Radio Essay

- The Symbolic Meaning of the Radio in The Enormous Radio       Many authors use the personification of inanimate objects to symbolize the feelings and expressions of their characters. One example of this is in John Cheever’s short story, "The Enormous Radio." Although critics argue that the characteristics of the radio are the opposite of those of Jim and Irene Westcott, the radio actually reflects the couple’s life. Even though in the beginning of the story the Westcotts’ old radio is outdated and constantly malfunctioning, it has the same innocence and simplicity as the couple....   [tags: Enormous Radio Essays]

Better Essays
657 words (1.9 pages)

Essay on The Difficult Lesson of The Enormous Radio

- The Difficult Lesson of  The Enormous Radio   "The Enormous Radio" by John Cheever begins with Jim and Irene Westcott who are an average American couple with an average American family. Cheever describes them as middle-aged, having two young children, a pleasant home, and a sufficient income. On the surface they seem to have a perfect life, but underneath this is not the case. In the course of the story, Irene’s imperfections are revealed by a hideous radio. The radio was bought to give the Westcott’s listening pleasure, but then they discover it can hear all the neighbors’ conversations....   [tags: Enormous Radio]

Better Essays
969 words (2.8 pages)

Essay on Radio Goes Sky-High At Xm Satellite Radio

- In 1988, American Mobile Satellite Corporation (AMSC) was formed with the intention of providing a satellite telephone, fax and data network. It was ruled by the Federal Communications Commission (FCC) that sufficient bandwidth existed for only one license to be issued for such broadcasting, which forced the competing firms to form the joint venture. It was the above named American Mobile Satellite Corporation (AMSC) who was granted the license. In 1992, CD Radio, who later changed their name to Sirius Satellite Radio, successfully petitioned the FCC and Congress to examine the creation of a new digital audio radio service in the United States (Uhle, 1998)....   [tags: XM Radio Satellite]

Free Essays
2001 words (5.7 pages)

Essay about History of Radio

- Radio History      The radio has evolved over time. The radio we listen to today has a different format, purpose, viewer reach, and clarity than it did before the 1950s. The radio has survived the threat of the television industry by changing with the times. It has been dealt with in the law through acts and the creation of the government regulating agency (FCC). Today the radio is the cheapest and most affective way to communicate with everyone around the world. It began with the invention of the telegraph by Samuel Morse in 1844 and developed as the knowledgeable minds of inventors and engineers worked from the late 1800s to the present to create the powerful communications medium we know...   [tags: American History Radio Media Essays]

Better Essays
2074 words (5.9 pages)

The Benefits of XM Radio Essay

- The Benefits of XM Radio Over the years, many people all over have listened to the radio for entertainment and information. Radio supplies news, sports, music, talk, and many other options with great ease. However, since television has become so popular lately, people look to it as an alternative to radio for the previously stated options. The reason for this can be linked to the redundancy that radio has encountered by not offering anything new and exciting for people to become interested about....   [tags: Radio Technology Entertainment Essays]

Better Essays
1492 words (4.3 pages)

Essay on John Cheever's The Enormous Radio

- John Cheever's "The Enormous Radio" In the short story by John Cheever called "The Enormous Radio" it begins with Jim and Irene Westcotts appearing like the perfect American family. Cheever describes them as "the kind of people who seem to strike that satisfactory average of income, endeavor, and respectability" (Cheever 1). What is ironic about this story is the Westcotts are far from being the perfect family and the community they try to conform to is just as imperfect as the Westcotts themselves....   [tags: John Cheever Enormous Radio]

Better Essays
639 words (1.8 pages)

Essay on Implementing Radio in Somalia

- Implementing Radio in Somalia Implementation of radio technology in helping underdeveloped countries is a cheap and effective solution in spreading education, health information, and news about local and foreign affairs. Radio can reach the most people (approximately an area of a 20 km radius) with the least amount of money, energy and effort. In comparison to Information and Communication Technologies (ICT) and Internet connectivity, radio management is easily teachable and requires less man-hours in training; Internet technology on the other hand, while perhaps more sophisticated, requires longer training hours and more expensive equipment....   [tags: Radio Technology Somalia Essays]

Better Essays
3794 words (10.8 pages)

Radio Waves Essay

- Radiowaves are the oscillations of magnetic waves by varying the modulation to generate different signals which can be converted into information such as sound, video, or digital communication. As these waves pass through a conductor, an alternating current is generated and this can be converted into usable information. As one could see from the picture above, radio waves are the the electromagnetic waves with wave lengthes between 1mm and 10 Mm. This converts to a frequency range of 300Ghz to 30Hz, respectively....   [tags: physics radio wave]

Free Essays
363 words (1 pages)

Radio Advertising Essay

- Radio advertising would be impossible without the radio. Radio waves were discovered and studied by Heinrich Hertz in 1867 (Schoenherr, 2001). Guglielmo Marconi invented a transmitter in 1894 and formed the first wireless telegraph and signal company in 1897 (Schoenherr, 2001). Reginald Fessenden of Canada invented the continuous-wave voice transmitter and sold it to Westinghouse in 1910. Several amateurs began to broadcast information from music to news over the airwaves as soon as crystal radio receivers became available from 1912 to 1921 (Schoenherr, 2001)....   [tags: Radio Marketing Ads Advertisement]

Free Essays
1701 words (4.9 pages)