difference in decibels between the signal emitted from a sound device and the noise emitted from the same sound device
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Signal-to-noise ratio Definition from Language, Idioms & Slang Dictionaries & Glossaries
signal-to-noise ratio
n : the ratio of signal intensity to noise intensity [syn: signal-to-noise, signal/noise ratio, signal/noise, s/n]
Noun
1. the ratio of signal intensity to noise intensity
(synonym) signal-to-noise, signal/noise ratio, signal/noise, S/N
(hypernym) ratio
Signal-to-noise ratio Definition from Business & Finance Dictionaries & Glossaries
A mathematical equation that indicates the magnitude of an experimental effect above the effect of experimental error due to chance fluctuations.
Signal-to-noise ratio Definition from Government Dictionaries & Glossaries
The ratio of the amplitude of the desired signal to the amplitude of noise signals at a given point in time.
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )Signal-to-noise ratio Definition from Science & Technology Dictionaries & Glossaries
The ratio of the amplitude of the desired signal to the amplitude of noise signals at a given point in time. [JP1] Note 1: SNR is expressed as 20 times the logarithm of the amplitude ratio, or 10 times the logarithm of the power ratio. Note 2: SNR is usually expressed in dB and in terms of peak values for impulse noise and root-mean-square values for random noise. In defining or specifying the SNR, both the signal and noise should be characterized, e.g., peak-signal-to-peak-noise ratio, in order to avoid ambiguity.
The ratio of the signal power to the noise power, expressed in dB; usually a baseband signal measurement. Higher values indicate less background noise.
This standardized measure of effect size is used in the Analysis of Variance to characterize the overall level of population effects, and is very similar to the RMSSE . It is the square root of the sum of squared standardized effects divided by the number of effects. For example, in a 1-Way ANOVA, with J groups, f is calculated as
For more information see the chapter on Power Analysis .
For more information see the chapter on Power Analysis .
1. The ratio of the total signal to the total noise which shows how much higher the signal level is than the level of the noise. A measure of signal quality. 2. Ratio of the amplitude of the optical signal to the amplitude of the noise.
Signal-to-noise ratio Definition from Computer & Internet Dictionaries & Glossaries
[from analog electronics] n. Used by hackers in a generalization of its technical meaning. `Signal' refers to useful information conveyed by some communications medium, and `noise' to anything else on that medium. Hence a low ratio implies that it is not worth paying attention to the medium in question. Figures for such metaphorical ratios are never given. The term is most often applied to Usenet newsgroups during flame wars. Compare bandwidth. See also coefficient of X, lost in the noise.
The ratio between what goes in a device designed to alter or record sound, and what comes out the other end. If what you get out the other end is all distorted or hissy the piece of equipment has a low signal to noise ratio. A very expensive DAT machine for example, will have a high S/N ratio because what you get out will sound very close to what you put in. The same goes for a very expensive digital effects processor, if you want a sound to come out with reverb on it and instead it comes out with reverb and a bunch of hiss you would not be very happy.
Signal-to-noise ratio Definition from Encyclopedia Dictionaries & Glossaries
Signal-to-noise ratio (often abbreviated 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 the noise power. A ratio higher than 1:1 indicates more signal than noise. While SNR is commonly quoted for electrical signals, it can be applied to any form of signal (such as isotope levels in an ice core or biochemical signaling between cells).
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Signal-to-noise ratio Definition from Law Dictionaries & Glossaries
A measure of signal strength relative to background noise.
Source: The President's DNA Initiative ( About )Signal-to-noise ratio Definition from Entertainment & Music Dictionaries & Glossaries
The ratio in decibels between an audio signal voltage and noise voltage. A device with a low signal-to-noise ratio is considered noisy, and a device with a high signal-to-noise ratio is considered clean or quiet, with little background noise accompanying the signal.
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This is the ratio of the desired signal to the unwanted noise in an audio or video record/playback system.
