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The method of modulation has very little to do with the distance traveled, this is more dependent upon the frequency of the carrier. As the frequency gets higher the wave takes on more and more the characteristics of light. For example microwaves need to have the receiving dishes (antennae) in line of site with the transmitter.
In practical circumstances it appears the AM travels further but that is only because AM broadcasts at lower frequencies (typically 526KHz to 1625KHz) (MF) and FM at higher frequencies (typically 88MHz to 108MHz)(VHF)
What else can I help you with?
What is the relation between carrier frequency and modulating signal?
If the modulating system is AM (Amplitude Modulation) then the amplitude of the carrier wave changes with the amplitude of the modulation. On a specrum analyser that shows up as frequency sidebands. If the frequency of the carrier waves depends on the amplitude of the modulating signal that is called FM (frequency modulation). On a spectrum analyser that shows up as sidebands also.
Do cells phones interfer with wireless microphones?
All communication systems use electromagentic waves which by the law of Superposition of Waves travel independently in any meadium and hence do not interfere but if the frequencies tend to match then the carrier waves with amplitude modulation are more affected and give poor quality sound at the receiving end than the frequency modulated carrier waves.
How are sound and surface waves longitudinal waves?
Because the vibrations of both the waves travel parallel to the direction of propagation of waves. For eg: both the waves have amplitude, frequency etc.
How is voice communications converted to digital signals?
The human voice is an analogue signal because the frequency of the sound varies in the sound waves as well as their amplitude that gives the power. Analog signal is defined as a signal that has a continuously varying amplitude or frequency. Human speech, and everything else a human hear, is in analog form.
What are the characteristics of a sine wave of voltage?
Some of the three characteristics of a wave that can be measured include the frequency, wavelength and amplitude. The amplitude would correspond to loudness in sound waves and brightness where light is concerned.
What does fm and am stand for?
AM-Amplitude modulated FM-Frequency modulated Explanation: The frequency and amplitude refer to the width and height of wavelengths in the radio waves that are used to transmit the signal. FM is usually a better signal than AM because the frequency of the waves is less distorted than amplitude.
Sound quality between AM and FM?
There are two types of modulations. They are amplitude modulation and frequency modulation. In AM, amplitude of the signal is modified. In FM, frequency is getting modulated. Frequency modulated with carrier waves are transmitted and received by receivers without any distortion.
Does the frequency vary in transmission?
this depends on if you are using amplitude modulated (am) or frequency modulated (FM) waves. am waves have a fixed frequency, and so can be sent a lot further, but do not give good signal quality because the amplitude carries the data and therefore it is affected badly by interference. FM waves have a constant amplitude, meaning they have better quality, but the frequency contains the data, meaning it changes all the time and therefore cannot be used for very long distances
What two properties of EM waves are used to attach info to radio signals?
The only properties of EM waves that you can control are amplitude and frequency. (Wavelength is related to frequency in a simple numerical way.) Amplitude-modulated radio (AM) is what you listen to between 550 and 1700 on your dial, and Frequency-modulated radio (FM) is what you listen to between 88 and 108. There are also slick high-tech methods of attaching one stream of information to the amplitude and different information to the frequency at the same time.
How do waves carry signals?
Waves can be varied (modulated) by either changing amplitude (amplitude modulation AM) or changing frequency (wavelength) (frequency modulation FM). The modulations are used to carry the information signal.
What is the three basic properties of waves?
The three basic properties of waves are frequency (number of waves per unit time), wavelength (distance between successive wave crests), and amplitude (maximum displacement from the equilibrium position).
What are the three ways in which waves can be measured?
Waves can be measured in terms of their amplitude, frequency, and wavelength. Amplitude refers to the height of the wave, frequency is the number of waves passing a point in a given time, and wavelength is the distance between two corresponding points on a wave.
What affect if any does frequency have on the amplitude of the waves?
Frequency has no effect on teh amplitude of a wave.
What are the 4 characteristics of waves?
The four characteristics of waves are amplitude (height of the wave), wavelength (distance between two points on a wave), frequency (number of waves that pass a point in a given time), and speed (how fast the wave travels).
REM sleep is characterized by what frequency and what amplitude brain waves?
High frequency and low amplitude.
What are 4 properties that all waves have?
Four properties that all waves have are amplitude (height of wave), wavelength (distance between wave peaks), frequency (number of waves that pass a point in a given time), and speed (how fast the wave travels).
How is frequency and amplitude related?
Frequency and amplitude are two key characteristics of waves. In general, higher frequency waves have a shorter wavelength and carry more energy. Meanwhile, amplitude refers to the height of a wave and is not directly related to frequency.
