shot noise

Noun

Meaning

shot noise (countable and uncountable, plural shot noises)

A kind of noise that can be modelled by a Poisson process, originating in electronics from the discrete nature of electric charge, and associated with the particle nature of light in photon counting in optical devices.
Synonym: Poisson noise

Examples

Because the electron has such a tiny charge, however, shot noise is of relative insignificance in many (but not all) cases of electrical conduction. Source: Internet

However, shot noise is temperature and frequency independent, in contrast to Johnson–Nyquist noise, which is proportional to temperature, and flicker noise, with the spectral density decreasing with the frequency. Source: Internet

However, shot noise in the raw data is prominent in the reconstructed images and areas of high tracer uptake tend to form streaks across the image. Source: Internet

But since the strength of the signal itself increases more rapidly, the relative proportion of shot noise decreases and the signal to noise ratio (considering only shot noise) increases anyway. Source: Internet

However this reduction in shot noise does not apply when the current results from random events at a potential barrier which all the electrons must overcome due to a random excitation, such as by thermal activation. Source: Internet

In electronics shot noise originates from the discrete nature of electric charge. Source: Internet

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