attenuation
Quick Summary
Attenuation refers to the reduction in the intensity or amplitude of a wave as it travels through a medium. This phenomenon occurs due to various physical processes, including the absorption of the wave's energy by the medium, which can convert it into heat. For sound waves, attenuation is also influenced by the fluid's viscosity and is proportional to the square of the wave's frequency.12
Geometric factors also contribute to attenuation. For spherical or circular waves, the energy spreads out over an increasingly larger area as the wave propagates. This distribution of energy leads to a decrease in intensity, following the inverse square law, where intensity is inversely proportional to the square of the distance from the source. While plane waves theoretically propagate without loss, real-world waves often experience attenuation due to these factors.32
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telecommunications mediaTransmission media and the problem of signal degradationdistortion, and attenuation (reduction in power). Noise is the presence of random, unpredictable, and undesirable electromagnetic emissions that can mask the intended information signal. Distortion is any undesired change in the amplitude or phase of any component of an information signal that causes a change in theā¦
Read Moredistortion, and attenuation (reduction in power). Noise is the presence of random, unpredictable, and undesirable electromagnetic emissions that can mask the intended information signal. Distortion is any undesired change in the amplitude or phase of any component of an information signal that causes a change in theā¦
Read More- telecommunications mediaTransmission media and the problem of signal degradation
ā¦signals suffer some degree of attenuation as they pass through the transmission medium. The principal cause of power loss is dissipation, the conversion of part of the electromagnetic energy to another form of energy such as heat. In communications media, channel attenuation is typically expressed in decibels (dB) per unitā¦
Read Moreā¦signals suffer some degree of attenuation as they pass through the transmission medium. The principal cause of power loss is dissipation, the conversion of part of the electromagnetic energy to another form of energy such as heat. In communications media, channel attenuation is typically expressed in decibels (dB) per unitā¦
Read More - telecommunications mediaApplications of wire
Because of the high signal attenuation inherent in wire, transmission over distances greater than a few kilometres requires the use of regularly spaced repeaters to amplify, restore, and retransmit the signal. Transmission lines also require impedance matching at the transmitter or receiver in order to reduce echo-creating reflections. Impedance matchingā¦
Read MoreBecause of the high signal attenuation inherent in wire, transmission over distances greater than a few kilometres requires the use of regularly spaced repeaters to amplify, restore, and retransmit the signal. Transmission lines also require impedance matching at the transmitter or receiver in order to reduce echo-creating reflections. Impedance matchingā¦
Read More - telecommunications mediaApplications of wire
The high attenuation of flexible cable restricts its utility to short distancesāe.g., spans of less than one kilometre, or approximately a half-mileāunless signal repeaters are used. For high-capacity long-distance transmission, a more efficient wire medium is rigid coaxial cable. The first such transatlantic telephone cable (TAT-1) wasā¦
Read MoreThe high attenuation of flexible cable restricts its utility to short distancesāe.g., spans of less than one kilometre, or approximately a half-mileāunless signal repeaters are used. For high-capacity long-distance transmission, a more efficient wire medium is rigid coaxial cable. The first such transatlantic telephone cable (TAT-1) wasā¦
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