TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

SIGNAL/NOISE RATIO [15 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-05-11

English

Subject field(s)
  • Collaboration with the FAO
  • Audio Technology
  • Sonar and Underwater Detection (Military)
  • Commercial Fishing
CONT

The upper water layer of the ocean contains air bubbles, induced by wind and waves. These air bubbles attenuate the sound transmission and reception from a hull-mounted transducer... The thickness of the bubble layer may be 5-10 m, or more, depending on the sea state. A towed transducer operates below this bubble layer. The transducer is closer to the fish. This gives a better signal to noise ratio, and also the resolution of single fish is improved because the width of the sound beam is smaller. For the study of deep water biological resources[, ] below 500 m[, ] a towed transducer is essential.

French

Domaine(s)
  • Collaboration avec la FAO
  • Électroacoustique
  • Sonar et détection sous-marine (Militaire)
  • Pêche commerciale

Spanish

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Record 2 2020-01-29

English

Subject field(s)
  • Electronics
  • Astronomy
Universal entry(ies)
Em
correct, symbol
DEF

... noise equivalent input when the quantity that the detector is being used to measure or detect is a uniform irradiance.

CONT

The noise equivalent flux density is defined as the level of flux density required to obtain a unity signal to noise ratio in one second of integration with the detector.

OBS

noise equivalent irradiance: designation standardized by the International Electrotechnical Commission (IEC).

French

Domaine(s)
  • Électronique
  • Astronomie
Entrée(s) universelle(s)
Em
correct, symbol
DEF

[...] excitation équivalente au bruit lorsque la grandeur que l'on mesure ou détecte en utilisant le récepteur est un éclairement énergétique uniforme.

OBS

éclairement équivalent au bruit: désignation normalisée par la Commission électrotechnique internationale (CEI).

Spanish

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Record 3 - external organization data 2012-09-11

English

Subject field(s)
  • Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies)
06.01.114 (19762)
ISO/IEC standard entry number
DEF

ratio, generally expressed in decibels, of the power of the wanted signal to that of the coexistent noise at a specified point in a transmission channel, usually at the receiver output, under specified conditions [IEC 60050-713 : 1998, 713-11-19]

OBS

The signal cannot generally be separated from noise, and in practice the ratio(signal+noise) to noise is measured. [IEC 60050-713 : 1998, 713-11-19]

OBS

The specified conditions comprise among others, the nature and characteristics of the wanted signal, the nature and characteristics of the noise, the receiver and antenna characteristics such as the bandwidth. [IEC 60050-713:1998, 713-11-19]

OBS

signal/noise ratio; S/N : term, abbreviation and definition standardized by ISO/IEC [ISO/IEC 19762-4 : 2008].

French

Spanish

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Record 4 2010-04-29

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Weather Stations and Meteorological Instruments and Equipment
  • Acoustics (Physics)
DEF

A measurement signal [that] consists of a sequence of pseudo-random numbers [or pulses] that are sent as audio to [an] output.

CONT

MLS is an abbreviation for Maximum Length Sequence. ... Nowadays Maximum Length Sequence measurements are quite standard in many different application fields. One of them is acoustics. ... The MLS method can also be used to analyze and obtain information about the impedance or the absorption coefficient of a surface.

CONT

The existing wind speed instrument... measures wind speed and direction simultaneously with good accuracy.... Other possible methods to collect wind data simultaneously are for example hotwire anemometer instruments or MLS(maximum length sequence).... In brief, the travel time of a sound pulse is used to determine the wind speed. The MLS method can give the wind component along the sound propagation path with sufficient accuracy and can also increase the signal to noise ratio.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Stations, instruments et équipements météorologiques
  • Acoustique (Physique)
DEF

[...] signal binaire périodique composé de suites pseudo-aléatoires [...]

CONT

MLSSA est un système de mesures de différents types de systèmes linéaires mais son application première est le domaine des mesures audio et acoustiques. Les initiales MLSSA signifient : Maximum-Length Sequence System Analyser (Analyseur à système de séquences de longueur maximale)[...] MLSSA utilise un signal test de type spécial appelé une séquence de longueur maximale (MLS) comme alternative au stimulus classique par bruit blanc. Contrairement au bruit blanc, une MLS est déterminée et périodique et contient néanmoins toutes les caractéristiques typiques du bruit blanc.

Spanish

Campo(s) temático(s)
  • Medición y análisis (Ciencias)
  • Estaciones, instrumentos y equipos meteorológicos
  • Acústica (Física)
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Record 5 - external organization data 2009-08-04

English

Subject field(s)
  • Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies)
01.01.08 (19762)
ISO/IEC standard entry number
DEF

sequential series of bits comprising one character and handled as one unit [ISO/IEC 2382-16, 16.04.13]

OBS

The number of bits in a byte is fixed for a given data processing system.

OBS

The number of bits in a byte is usually 8.

OBS

A byte is often eight logical data bits, but may include error detection or correction bits.

OBS

A measure of the transmission capability of a communication channel expressed in bits. s-1 and related to channel bandwidth and signal to noise ratio by the Shannon equation : Capacity, C=B log2(1 + S/N), where B is the bandwidth and S/N the signal to noise ratio.

OBS

byte: term and definition standardized by ISO/IEC [ISO/IEC 19762-1:2008].

French

Spanish

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Record 6 2006-01-11

English

Subject field(s)
  • Telephone Metering
  • Telecommunications Transmission
  • Remote Sensing
DEF

In analog and digital communications, signal-to-noise ratio, often written S/N or SNR, is a measure of signal strength relative to background noise[;] the ratio is usually measured in decibels(dB).

OBS

This ratio is usually in terms of peak values in the case of impulse noise and in terms of the root-mean-square values in the case of random noise.

OBS

This ratio may be a function of bandwidth of the transmission system.

OBS

signal to noise ratio; SNR : term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).

French

Domaine(s)
  • Téléphonométrie
  • Transmission (Télécommunications)
  • Télédétection
DEF

Pour un équipement électronique, ce rapport s'obtient en comparant le signal d'entrée avec le signal de sortie pour mesurer le niveau du bruit (signal parasite) ajouté par l'équipement.

OBS

Ce rapport s'exprime souvent en décibels (dB) ou parfois en népers (Np).

OBS

rapport signal sur bruit; rapport signal/bruit; SNR; S/B : termes et abréviations uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Key term(s)
  • rapport signal bruit

Spanish

Campo(s) temático(s)
  • Telefonometría
  • Transmisión (Telecomunicaciones)
  • Teledetección
DEF

Relación entre las amplitudes de la señal deseada y del ruido en el mismo punto.

OBS

Normalmente se expresa en decibelios y da idea de la sensibilidad de un receptor de radio.

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Record 7 2005-08-23

English

Subject field(s)
  • Acoustics (Physics)
CONT

A-weighting. A system of adjusting signal to noise ratio measurements to take into account the differing sensitivity of the human ear to different frequencies. Thus an A-weighted signal to noise ratio more accurately reflects how a system's noise performance will be perceived than an unweighted measure.

French

Domaine(s)
  • Acoustique (Physique)
DEF

Rapport signal-bruit dont la mesure est ajustée en prenant en compte le spectre de sensibilité de l'oreille humaine face à différentes fréquences.

Spanish

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Record 8 2002-11-13

English

Subject field(s)
  • Range Measurements (Telecommunications)
  • Radio Waves
CONT

Theoretical studies have shown the potential scientific value of multi-spacecraft radio tomographic imaging of the magnetosphere. The <10 RE WIND perigee passes during August 2000 afforded a unique opportunity to test and verify the capabilities of radio tomography by measuring interspacecraft electromagnetic wave propagation parameters using the Radio Plasma Imager(RPI) on IMAGE as the transmitter and the WAVES instrument on WIND as the receiver.... We show how changes in the path-integrated electron density/magnetic field product can be unambiguously measured from this continuous, low signal to noise ratio, single frequency measurement.

French

Domaine(s)
  • Mesures à distance (Télécommunications)
  • Ondes radioélectriques

Spanish

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Record 9 2001-08-23

English

Subject field(s)
  • Scientific Instruments
  • Metrology and Units of Measure
CONT

In practice, it is sensible to work with a spectrometer resolution which is high enough to avoid markedly non-linear calibration curves. This, of course, will increase the required spectrometer scan time, for a given signal/noise ratio in the spectrum, and a compromise may be necessary. The problem will not arise to a marked degree in the case of measurements on liquid samples, although peaks from some types of vibrational modes, e. g. the out of plane deformation modes of the hydrogen atoms attached to aromatic rings, give sharp and analytically useful peaks which are narrow enough to give these non-linear calibration curves.

OBS

calibration curve: A plot of calibration data, giving the correct value for each indicated reading of a meter or control dial.

French

Domaine(s)
  • Instruments scientifiques
  • Unités de mesure et métrologie
CONT

La zone aveugle et son antidote, l'activation. [...] Il est assez fréquent, notamment en électronique, de constater la synchronisation de deux oscillateurs de fréquences propres très voisines, sous l'effet d'un couplage. Ce phénomène existe dans les gyromètres laser et conduit, en régime permanent, à des courbes d'étalonnages non linéaires [...] Un artifice, appelé activation permet de pallier les inconvénients [...]; ce procédé consiste à faire travailler le gyromètre en permanence ou, à la rigueur, pendant la majeure partie du temps, dans la zone linéaire de sa courbe d'étalonnage traduisant m [(oméga]).

Spanish

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Record 10 2000-05-25

English

Subject field(s)
  • Peace-Keeping Operations
  • Arms Control
OBS

[the first recorded P-wave from an explosion or earthquake, as distinguished from background noise : discrimination requires a large signal to noise ratio]

French

Domaine(s)
  • Opérations de maintien de la paix
  • Contrôle des armements
OBS

Fascicule no 2, NY, 1990.

OBS

Reproduit du lexique «Disarmament and Peace Keeping/Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.

Spanish

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Record 11 1994-05-31

English

Subject field(s)
  • Mathematical Geography
  • Remote Sensing
DEF

A receiver containing many independent channels.

OBS

Such a receiver offers highest SNR(signal to noise ratio) because each channel tracks one satellite continuously.

OBS

Term and definition provided by the Canadian Hydrographic Service.

French

Domaine(s)
  • Géographie mathématique
  • Télédétection
DEF

Récepteur comportant un grand nombre de voies indépendantes. Ces récepteurs présentent les RSB (rapport signal/bruit) les plus élevés parce que chacune des voies permet de suivre un satellite de manière ininterrompue.

Spanish

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Record 12 1991-05-28

English

Subject field(s)
  • Radio Interference
  • Computer Graphics
DEF

Noise whose direct consequence is to diminish the signal to noise ratio : it manifests itself in the form of peaks surrounding the central correlation peak.

French

Domaine(s)
  • Perturbations radio
  • Infographie

Spanish

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Record 13 1984-10-22

English

Subject field(s)
  • Telecommunications
OBS

S/N SNR signal/noise signal/noise ratio signal/bruit(Piraux) rapport signal/bruit o 23 concernant la radiodiffusion 1971)

French

Domaine(s)
  • Télécommunications

Spanish

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Record 14 1982-06-03

English

Subject field(s)
  • Range Measurements (Telecommunications)
DEF

Length which produces the shortest possible total outage time, or as the length which gives the highest possible mean value for the signal/noise ratio.

French

Domaine(s)
  • Mesures à distance (Télécommunications)
DEF

[Longueur] qui donne le temps total d'interruption le plus faible possible, ou encore/celle qui donne pour le rapport signal/bruit la valeur moyenne la plus élevée.

Spanish

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Record 15 1980-08-25

English

Subject field(s)
  • Electrical Measuring Equipment
OBS

The signal/noise(S/N) integrator monitors the signal-to-noise ratio for each beam.

French

Domaine(s)
  • Appareils de mesures (Électricité)

Spanish

Save record 15

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