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ULTRACOUSTIQUE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2001-10-01

English

Subject field(s)
  • Acoustics (Physics)
DEF

The science of ultrasonic sound waves.

CONT

Ultrasonics is the general term for the study and application of ultrasonic sound and vibrations.

CONT

... ultrasonics ... involves research into acoustical phenomena whose vibration rate is above the audible range (i.e., roughly 20,000 hertz) ....

OBS

At one time called supersonics, the term ultrasonics is now accepted to distinguish this area of high-frequency sound propagation from the cases of supersonic aircraft, supersonic fluid flow, and shock waves in fluids, which have to do with speeds higher than the speeds of sound.

French

Domaine(s)
  • Acoustique (Physique)
CONT

L'étude des propriétés des ondes ultrasonores, des moyens d’émission et de détection, de leurs effets physiques, chimiques et biologiques, de leurs applications à la recherche fondamentale ou appliquée, à la médecine ou à l'industrie, constitue un chapitre [...] des sciences physiques que l'on appelle ultracoustique.

Spanish

Campo(s) temático(s)
  • Acústica (Física)
DEF

Estudio de las ondas de presión cuya frecuencia se encuentra por encima de los límites audibles (20 kilociclos por segundo), pero que son de la misma naturaleza que las ondas sonoras.

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Record 2 1986-06-16

English

Subject field(s)
  • Acoustics (Physics)
DEF

The science of infrasonic sound waves.

CONT

Infrasonics. Infrasonic waves are those whose frequencies are nominally below the lower limit of human hearing.

French

Domaine(s)
  • Acoustique (Physique)
OBS

par analogie avec "ultracoustique" qui est l'étude des ondes ultrasonores et de leurs applications(cf. AUTEC, 1969, vol. 10, p. 74).

Spanish

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