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acoustic impedance |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson | 0.04 sec. |
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impedance /im·ped·ance/ (im-pēd´ans) obstruction or opposition to passage or flow, as of an electric current or other form of energy. Symbol Z . acoustic impedance an expression of the opposition to passage of sound waves, being the product of the density of a substance and the velocity of sound in it. aortic impedance the sum of the external factors that resist ventricular ejection. acoustic impedance, interference with the passage of sound waves by objects in the path of those waves. It equals the velocity of sound in a medium multiplied by the density of the medium. The acoustic impedance of bone may be nearly five times as great as that of blood. Testing middle ear acoustic impedance is part of audiologic evaluation batteries used to detect middle ear problems. impedance obstruction or opposition to passage or flow, as of an electric current or other form of energy. acoustic impedance an expression of the opposition to passage of sound waves, being the product of the density of a substance and the velocity of sound in it. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | ||
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| Ultrasound has selective interfacial
effects at the bone surface resulting from bone having a high absorption
coefficient, a high relative acoustic impedance, and an ability to
propagate shear waves. The evolution of QI
began with 'bright spots', and has advanced through many
stages including acoustic impedance inversion, AVO, neural networks, and
stochastic inversion. iMOSS is a technology solution designed to provide advanced
well-driven rock-physics and seismic modeling tools to aid in the
interpretation of seismic attributes such as acoustic impedance and AVO. |
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