Internal electronic noise of measurement systems can be reduced through the use of low-noise amplifiers. It is often possible to reduce the noise by controlling the environment. This includes electronic noise, but can also include external events that affect the measured phenomenon - wind, vibrations, the gravitational attraction of the moon, variations of temperature, variations of humidity, etc., depending on what is measured and of the sensitivity of the device. Recording from a thermogravimetric analysis device with poor mechanical isolation the middle of the plot shows lower noise due to reduced human activity at night.Īll real measurements are disturbed by noise. S N R = P s i g n a l P n o i s e, Noise reduction Signal-to-noise ratio is defined as the ratio of the power of a signal (meaningful input) to the power of background noise (meaningless or unwanted input): ( February 2022) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources.
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