TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The transducers may transmit one or more sonar signals …, e. g. [, ] sonar beams, into a body of water … with an emitting transducer … or similar device. When the sound waves, of the sonar beams, strike anything of differing acoustic impedance(e. g., the sea floor or something suspended in the water above the bottom), the sound waves reflect off that object … These echoes(or sonar returns …) may strike the emitting transducer element and/or a separate one or more sonar receiver elements, which convert the echoes back into an electrical signal which is processed by a processor … and sent to a display … mounted in the cabin or other convenient location in the watercraft.  2, record 1, English, - transmitting%20transducer

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Specific acoustic impedance is the complex ratio of the effective sound pressure at a point to the effective particle velocity at a point. The unit [of measure] is the... MKS rayl.  2, record 2, English, - MKS%20rayl

Record number: 2, Textual support number: 1 OBS

MKS: metre-kilogram-second.  3, record 2, English, - MKS%20rayl

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

L'impédance acoustique spécifique […] est le quotient complexe de la pression sonore par la vitesse de vibration. [L'unité de mesure est] le rayl MKS […]  1, record 2, French, - rayl%20MKS

Record number: 2, Textual support number: 1 OBS

MKS : mètre-kilogramme-seconde.  2, record 2, French, - rayl%20MKS

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

If the sound encounters air or bone... the impedance mismatch is so great that almost all of the acoustic energy is reflected and nearly none is transmitted. This creates an acoustic shadow that obscures structures located deep to the air or bone.  1, record 3, English, - acoustic%20shadow

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

[...] les cônes d'ombre apparaissent quand les ultrasons rencontrent une structure plus atténuante que les structures voisines; dans ce cas (os, calcifications, air), il n'y a plus d'échos émis en arrière de la structure, d'où la présence d'une zone anéchogène [...]  3, record 3, French, - c%C3%B4ne%20d%27ombre

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The AZ26 clinical impedance audiometer is built to meet the demands of clinics and hearing specialists who require a comprehensive middle ear analyzer. Tympanometry with a range of pressure limits is available together with an extensive test battery of acoustic reflex tests which include reflex decay and latency measurement.  2, record 4, English, - clinical%20impedance%20audiometer

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

The c. g. s. unit of acoustic impedance analogous to the ohm as the unit of electrical impedance.  3, record 5, English, - acoustic%20ohm

Record number: 5, Textual support number: 1 CONT

The unit of acoustic impedance is the acoustic ohm, or dyne-sec/cm/in cgs units.  4, record 5, English, - acoustic%20ohm

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Unité d'impédance acoustique; c'est l'impédance d'une surface fictive de fluide qui, soumis à une pression sinusoïdale de 1 bar (valeur efficace), est animée d'un mouvement correspondant à un flux de vitesse (produit de la vitesse et de l'aire de surface) égal à 1 m³/s (valeur efficace).  1, record 5, French, - ohm%20acoustique

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Acoustic transmitter....-A transmitter of acoustic energy which propagates that energy in a directional manner is described. An acoustic signal generator is connected at one end of an acoustic transmission line which exhibits a certain characteristic impedance. The line has a number of ports spaced along its length.... acoustic energy is partitioned evenly at each port so as to define an array of equal strength radiators having directional acoustic signal propagating characteristics.  2, record 6, English, - acoustic%20transmitter

Record number: 6, Textual support number: 2 CONT

Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces ... being adapted to be subjected to vibrational movement by means of a drive unit ... through at least one push element ... and two plate-like end pieces ... which are connected to the sound-emitting surfaces.  3, record 6, English, - acoustic%20transmitter

Record number: 6, Textual support number: 1 OBS

acoustic transmitter: term used at Natural Resources Canada - Earth Sciences Sector.  4, record 6, English, - acoustic%20transmitter

Record number: 6, Textual support number: 1 PHR

Borehole acoustic transmitter.  5, record 6, English, - acoustic%20transmitter

Record number: 6, Textual support number: 2 PHR

Deep-sea acoustic transmitter.  6, record 6, English, - acoustic%20transmitter

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

émetteur acoustique sous-marin : Transducteur servant à produire des ondes sonores dans l'eau par transformation d'énergie électrique en énergie mécanique au moyen de l'effet piézo-électrique ou de la magnétostriction.  3, record 6, French, - %C3%A9metteur%20acoustique

Record number: 6, Textual support number: 2 CONT

Émetteur acoustique destiné notamment à la prospection sismique en mer, et doté de surfaces [...] émettant des sons et étant soumises à un mouvement vibratoire par une unité d'entraînement [...] par l'intermédiaire d'au moins un élément formant poussoir [...] et de deux pièces terminales en forme de plaque [...] reliées auxdites surfaces.  4, record 6, French, - %C3%A9metteur%20acoustique

Record number: 6, Textual support number: 1 OBS

transmetteur acoustique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  5, record 6, French, - %C3%A9metteur%20acoustique

Record number: 6, Textual support number: 1 PHR

Transmetteur acoustique pour trou de forage.  6, record 6, French, - %C3%A9metteur%20acoustique

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

At a given surface, the complex ratio of effective sound pressure averaged over the surface to the effective flux (volume velocity or particle velocity multiplied by the surface area) through it.  3, record 7, English, - acoustic%20impedance

Record number: 7, Textual support number: 1 CONT

... the acoustic impedance for a spherical wave has both real and imaginary components, corresponding to resistance and reactance, respectively.  4, record 7, English, - acoustic%20impedance

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Quotient complexe de la pression acoustique sur une surface donnée par le produit de la vitesse du mouvement vibratoire et de la surface considérée (produit que l'on appelle maintenant couramment flux de vitesse acoustique).  2, record 7, French, - imp%C3%A9dance%20acoustique

Record number: 7, Textual support number: 1 CONT

Impédance acoustique. [...] Z est en général composé d'une résistance et d'une réactance.  3, record 7, French, - imp%C3%A9dance%20acoustique

Record 7,  Textual support,  Spanish

Record number: 7, Textual support number: 1 DEF

Sobre una superficie, cociente complejo de presión acústica entre la velocidad de volumen a través de la superficie.  1, record 7, Spanish, - impedancia%20ac%C3%BAstica

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

Acoustic compliance, associated with a volume of air that is compressed by a net force without an appreciable average displacement of the center of gravity of the air in the volume, acts as a capacitance. Both acoustic mass and acoustic compliance are reactive portions of acoustic impedance...  1, record 8, English, - acoustic%20compliance

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Force nécessaire pour faire bouger un objet d'une certaine distance, objet suspendu, par exemple l'élasticité d'un ressort.  2, record 8, French, - %C3%A9lasticit%C3%A9%20acoustique

Record number: 8, Textual support number: 1 OBS

Les ressorts de la membrane dans un haut-parleur ont une élasticité mécanique. L'air au sein de la chambre de compression possède une élasticité acoustique.  2, record 8, French, - %C3%A9lasticit%C3%A9%20acoustique

Record number: 8, Textual support number: 2 OBS

Inverse de la raideur acoustique.  3, record 8, French, - %C3%A9lasticit%C3%A9%20acoustique

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

The density of liquids can be measured with acoustic techniques. This is done by measuring sound velocity and acoustic impedance of the liquid. The presented work describes a novel ultrasonic density sensor that determines the sound reflection coefficient to measure the acoustic impedance of the liquid. It aims to be suitable for industrial applications by achieving a high measurement accuracy while meeting the mechanical and chemical conditions of the process. The high accuracy is obtained with the help of an additional reference measurement inside the sensor.  2, record 9, English, - density%20sensor

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

Le Densima X, «le premier capteur de densité à installation simple», selon la société Densiline, permet la mesure en permanence de la densité des liquides contenus dans des cuves ou dans des canalisations à faible débit et à faible pression.  1, record 9, French, - capteur%20de%20densit%C3%A9

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

The real component of the acoustic impedance.  2, record 10, English, - acoustic%20resistance

Record number: 10, Textual support number: 1 CONT

... the real part of the acoustic impedance is termed acoustic resistance, and the imaginary part is termed acoustic reactance.  3, record 10, English, - acoustic%20resistance

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 DEF

Composante réelle de l'impédance acoustique.  2, record 10, French, - r%C3%A9sistance%20acoustique

Record number: 10, Textual support number: 1 OBS

Impédance acoustique. [...] Z est en général composé d'une résistance et d'une réactance.  3, record 10, French, - r%C3%A9sistance%20acoustique

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 CONT

Seam Testing Methods... There are number of procedures available which have applicability on different geomembranes... the ultrasonic impedance plane method works on the principle of acoustic impedance. A continuous wave of 160 to 185 kHz is sent through the seamed liner and a characteristic dot pattern is displayed on a CRT screen. Calibration of the dot pattern is required to signify a good seam; otherwise, it is not. The method has potential for all types of geomembranes but still needs additional development work.  1, record 11, English, - ultrasonic%20impedance%20plane%20method

Record 11,  Textual support,  French

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 DEF

The imaginary component of the acoustic impedance.  2, record 12, English, - acoustic%20reactance

Record number: 12, Textual support number: 1 CONT

... the real part of the acoustic impedance is termed acoustic resistance, and the imaginary part is termed acoustic reactance.  3, record 12, English, - acoustic%20reactance

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 DEF

Composante imaginaire de l'impédance acoustique. [Terme et définition normalisés par l'AFNOR et reproduits avec son autorisation.]  2, record 12, French, - r%C3%A9actance%20acoustique

Record number: 12, Textual support number: 1 OBS

Impédance acoustique. [...] Z est en général composé d'une résistance et d'une réactance.  3, record 12, French, - r%C3%A9actance%20acoustique

Record 12,  Textual support,  Spanish

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 OBS

tube-wave: A seismic surface wave travelling along the walls of a borehole; it is involved in acoustic logging.  2, record 13, English, - tubewave%20seismic%20logging

Record number: 13, Textual support number: 2 OBS

seismic log : The variation of acoustic impedance with arrival time or depth, determined from measurements of the amplitudes of successive reflection events on a seismic record.  2, record 13, English, - tubewave%20seismic%20logging

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 OBS

Source pour "diagraphie des ondes de tube" et "ondes tubulaires" : PASCAL.  1, record 13, French, - diagraphie%20des%20ondes%20de%20tube

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 DEF

a phenomenon in an electric, acoustic, or other such system in which the impedance is tending to infinity.  2, record 14, English, - antiresonance

Record 14,  Textual support,  French

Record number: 14, Textual support number: 1 CONT

Lorsque le nombre de ces éléments est suffisant (...) l'effet des résonances et des antirésonances s'estompe.  2, record 14, French, - antir%C3%A9sonance

Record number: 14, Textual support number: 2 CONT

Dans le cas des doubles vitres (...) l'isolement ne suit plus la "loi de masse" et la courbe de variation de l'isolement en fonction de la fréquence marque des résonances et antirésonances souvent accentuées.  3, record 14, French, - antir%C3%A9sonance

Record 14,  Textual support,  Spanish