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The average power attributable to thermal noise is:Thermal noise Nav = kTBwhere k is Boltzmann's constant = 1.38 x 1023 watts/Hz/oK, T is the absolute temperature in oK, and B is the bandwidth in which the measurement is made. |
Thermal noise can clearly be reduced by cooling the noise source and this very principle is being applied in some radio receivers using cryogenic coolers, to improve the receiver sensitivity. |
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