Signaalikohinasuhde

Signaalikohinasuhde, often abbreviated as SNR or S/N, is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to noise power. A high signaalikohinasuhde indicates that the signal is strong relative to the noise, which is generally desirable for accurate measurement or communication. Conversely, a low signaalikohinasuhde means that the noise is significant compared to the signal, which can make it difficult to extract useful information.

The signaalikohinasuhde is typically expressed in decibels (dB) because it is a logarithmic scale. This logarithmic representation is useful because it can represent a wide range of values concisely. For example, an SNR of 20 dB means the signal power is 100 times greater than the noise power, while an SNR of 30 dB means it is 1000 times greater. In many applications, such as telecommunications, audio recording, and image processing, maximizing the signaalikohinasuhde is a primary goal to ensure the quality and clarity of the transmitted or recorded information. Various techniques are employed to improve SNR, including filtering, averaging, and using more sensitive equipment. The acceptable SNR level varies depending on the specific application and its tolerance for error.