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AM stands for "Amplitude Modulation". The sound signal you hear is transmitted by modifying the amplitude of the carrier frequency.
FM stands for "Frequency Modulation". The sound signal you hear is transmitted by modifying the carrier frequency itself.
AM uses a 5Khz bandwidth with additional space to allow for signal separation avoiding interference between stations.
FM requires a wider bandwidth.
AM has lower sound quality and is subject to static from weather conditions and adjacent frequency radio transmissions.
FM has wider bandwidth per channel, due to the better ability to separate noise in the FM bandwidth.
AM has a longer range than FM and with the correct conditions can bounce a signal off the ionosphere allowing for longer range possibly causing interference with far away radio stations on the same frequency.
FM signals line of site only and will drop of after about 50 miles from the station as the earth curves away. To compensate for this, broadcasting stations use high transmission antennas.
Wiki User
∙ 7y ago
Wiki User
∙ 13y agoA.M. stands for "amplitude modulation," which means the data comprising the radio signal is transmitted at a constant frequency, with information (the pitch and tone of an announcer's voice, for example) indicated through the strength of individual radio wave-forms. With F.M., which stands for "frequency modulation," the strength of the radio wave is constant, with information indicated by the timing of the individual waves.
A graphic depiction of an AM signal would show the peaks and valleys of the sine wave varying constantly in height and depth, while the same picture of an FM signal would show the waves coming closer together and further apart.
Wiki User
∙ 13y agoRadio doesn't do us any good as a means of communication unless we have a way
to make the bare, naked radio wave carry information somehow. In order to do that,
we change some characteristic of the radio wave, according to a pattern that can be
recognized at the receiving end, and used to reconstruct the information. That process
is called "modulation".
The characteristics of a wave that everybody understands are its amplitude and
frequency. If the amplitude is changed in order to carry information, the process
is called Amplitude Modulation ... AM. If the frequency is changed in order to carry
information, the process is called Frequency Modulation ... FM.
Wiki User
∙ 14y agoAn AM (Amplitude Modulated) radio wave is one where a constant frequency carrier is modulated with a signal by varying the amplitude of the carrier.
An FM (Frequency Modulated) radio wave is one where a constant amplitude carrier is modulated with a signal by varying the frequency of the carrier.
Wiki User
∙ 13y agoBoth AM and FM radio waves use a continuous carrier wave. With AM the frequency is constant and amplitude of the wave is varied to carry the transmitted information (modulation). With FM the amplitude is constant and the frequency is varied.
Wiki User
∙ 13y agoAM waves stand for amplitude modulation carry information by changing amplitude of pulses
fm for frequency modulation ,carry information by changing frequency
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Which has a higher frequencies am radio waves or fm radio waves?
FM radio has the higher frequency which is why it sounds better. AM is a lower frequency but can travel further because the waves bounce off
What is the frequency of radio wave?
Fm radio waves travel at various frequencies between 87.5 MHz and 108.0 MHz
What has a greater frequency am waves or FM waves?
FM waves are of higher frequency than am waves.AM radio ranges from 535 to 1705 kilohertzFM radio ranges in a higher spectrum from 88 to 108 megahertz.
Why do mountains interfere with FM radio reception?
FM radio works like light. If a shadow is made (something in the way) , you get less light. Radio waves work in a straight line. If something is in the way, less radio waves. The rule is broken here if you use Am radio waves. Low clouds can make the waves bounce between the clouds and the ground and can travel as far as 1000 miles or further. So the answer is yes.
What is the wavelength of 11.5MHz a typical frequency for FM radio broadcasting?
Fm radio waves travel at various frequencies between 87.5 MHz and 108.0 MHz
What are FM waves?
FM radio uses frequency modulation to broadcast sound over radio. FM radio waves are usually transmitted between 87.5 to 108.0 megahertz.
Which waves carries AM and FM signals?
Radio waves
Which has a higher frequencies am radio waves or fm radio waves?
FM radio has the higher frequency which is why it sounds better. AM is a lower frequency but can travel further because the waves bounce off
What is the frequency of radio wave?
Fm radio waves travel at various frequencies between 87.5 MHz and 108.0 MHz
What transverse wave may be AM or FM?
AM and FM are modulation types, that can probably be used for different kind of waves; but they are usually applied to radio waves. Radio waves are a kind of electromagnetic waves.
What is the use of radio waves?
hearing FM and am news in radio
AM radio waves are able to traves farther than FM radio waves because?
AM waves are reflected by earth's ionosphere
What are the differences between AM and FM waves?
There is no fundamental difference in the waves. It so happens that in the USA, commercial AM radio broadcasts in a frequency band around 1 MHz, and FM radio broadcasts in a band around 100 MHz, so their frequencies and wavelengths are different. But that has nothing to do with being AM or FM waves. The codes used to manipulate the waves in order to make them carry information are different for AM and FM, but there's no physical difference in the waves themselves.
What has a greater frequency am waves or FM waves?
FM waves are of higher frequency than am waves.AM radio ranges from 535 to 1705 kilohertzFM radio ranges in a higher spectrum from 88 to 108 megahertz.
Why do mountains interfere with FM radio reception?
FM radio works like light. If a shadow is made (something in the way) , you get less light. Radio waves work in a straight line. If something is in the way, less radio waves. The rule is broken here if you use Am radio waves. Low clouds can make the waves bounce between the clouds and the ground and can travel as far as 1000 miles or further. So the answer is yes.
What is the wavelength of 11.5MHz a typical frequency for FM radio broadcasting?
Fm radio waves travel at various frequencies between 87.5 MHz and 108.0 MHz
What are the differences between AM and FM radio?
The main difference between AM and FM radio is the dial-in number and the amount of static each receive. AM radio preceded FM radio, with FM becoming popular in the 1950s.
