full name or meaning of FM radio?

Question

what you called fm radio

Answer 1

Frequency modulation

Answer 2

Yes, frequency modulation is correct, and there are some pretty complex answers here. But what does it MEAN?

Your station transmits sounds through radio waves. In order to separate all of that sound being transmitted, they have to make each station's transmission different. They do it by changing the way the waves look.

Draw a straight line, left to right, across a page. Now draw a squiggly line over it, so the top and bottom of each swoop is the same distance from the straight line. This is what a wave looks like. If you draw the squiggly line so there are more waves squished closer together, you've changed how often a wave happens - you've changed the "frequency." This is frequency modulation.

Now draw the squiggly line so there are as many waves as the first drawing, but make them go farther from the center line - higher and lower waves. This is how AM (amplitude modulation) works.

There's a good illustration of the two waves in the link below.

Answer 3

Frequency modulation.

If you think of a radio tower, amplitude modulation (AM) towers broadcast, or cast a "broad" signal, like a drip on a pond of water and the waves that go from that. It is amplified--if the Federal Communications Commission (FCC) allows a strong signal--it can be heard for miles and miles. A strong signal also squeezes out the signals closer to that frequency on the radio dial. The atmosphere, weather, concrete walls, bridges, lightning and power lines' static all affect an AM signal, which isn't all that great of a situation to listen to for good music.

FM, on the other hand, is a "frequency modulation" signal: it is a less powerful, narrow, radio signal. Visualize a steady, measured up and down wave closer along the ground, but for shorter distances (usually a metropolitan area). An FM receiver, found on your end, "locks in" on the signal. This system is more reliable and does go under bridges, and isn't as disturbed by the weather (but you will notice that it won't be as stable in a thunderstorm, for example).

All radio bandwiths are regulated by the FCC. There are some not available on your AM /FM radio dials--eight are regulated for cellular phones, and the rest are reserved for emergency uses.

The latest development is going to be "satellite" radio which will be sent from a station to a satellite, then the satellite's owner is able to "bundle" them all and send to you or your vehicle. You need special equipment for this.

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Answer 4

Frequency modulation.
A change in the frequency (pitch) of a signal. At low modulation rates, FM is perceived as vibrato or some type of trill, depending on the shape of the modulating waveform. When the modulating wave is in the audio range (above 20Hz or so), FM is perceived as a change in tone color. FM synthesizers, commonly found on computer soundcards, create sounds using audio-range frequency modulation.
http://www.tagnet.org/digitalhymnal/en/glossary_a-l.html

Answer 5

FM broadcasting is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation (FM) to provide high-fidelity sound over broadcast radio.

The original FM broadcast band in the United States until 1946 was on 42 to 50 MHz with 0.2 MHz channel spacing. This band was abandoned after World War II and is now allocated to a seldom-used two-way communications service.

The name "FM band" is misleading, since one can transmit FM on any frequency. All of these bands mentioned are in the VHF band which extends from 30 MHz to 300 MHz. Nevertheless "the FM band" is usually understood to refer to FM sound broadcast band (The terms "VHF" and "UKW" were onetime popular in parts of Europe).

More reading at: http://en.wikipedia.org/wiki/FM_Radio

Answer 6

Frequency Modulation

Answer 7

A cheap MP3 with FM ($50 or less, not one with a ton of memory) NOT an iPod...too expensive, and if I'm not mistaken you need wifi to listen to the radio on iPods. I had a $200 MP3 a few years ago that I loved so much...and I never purchased a single song. I recorded them all from the radio, they'd come out as perfect as downloaded songs and I got them for free. That $200 held about 15 hours of recorded songs, plus some pics (like 50). And no wifi required to get a radio signal...it was PERFECT.

Answer 8

Frequency Modulation, that is what FM stands for.

Answer 9

Frequency modulation. When you are searching the station you change frequencies that your radio accepts. Every station has a different frequency so your radio accepts only one at the time.

Answer 10

Frequency Modulated or modulation!! basicaly it refers to radio or tv wave frequency changes or modifies, it adjusts so that the carrier signal may be transmited in higher definition. as opposed to AM (amplitude modulation) where the frquency never changes but the amplitude of signal varies! got it?