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Definition of Acoustic impedance
1. Noun. Opposition to the flow of sound through a surface; acoustic resistance is the real component of acoustic impedance and acoustic reactance is the imaginary component.
Medical Definition of Acoustic impedance
1. The resistance that a material offers to the passage of a sound wave (colloquial); a property of a medium computed as the product of density and sound propagation speed (characteristic acoustic impedance). Discontinuities in acoustic impedance are responsible for the echoes on which ultrasound imaging is based. Unit: the rayl. (05 Mar 2000)
Lexicographical Neighbors of Acoustic Impedance
Literary usage of Acoustic impedance
Below you will find example usage of this term as found in modern and/or classical literature:
1. Science by American Association for the Advancement of Science (1883)
"A highly useful means appears to be ultrasound since the specific acoustic
impedance of highly mineralized tissue like enamel is strongly dependent on ..."
2. Permafrost: North American Contribution [to The] Second International Conference by Building Research Advisory Board Staff (1973)
"The geophysical logging program was designed to provide bulk modulus data from
the three-dimensional velocity measurements and permafrost acoustic impedance ..."
3. Roadside Noise Abatement by OECD Staff (1995)
"In Austria, studies and research are currently under way on further test methods,
such as acoustic impedance or absorption. In the Netherlands, efforts are ..."
4. Fission Gas Behaviour in Water Reactor Fuels: Seminar Proceedings, Cadarache by OECD Nuclear Energy Agency (2002)
"... and Z2: • Zl and Z2 being the acoustic impedance of the interfacing mediums.
• R is the reflection coefficient of the piezo/water/zircaloy/gas system. ..."
5. The Geophysical Expression of Selected Mineral Deposit Models edited by D. B. Hoover (1993)
"However, they can provide better structural detail and better estimates of depth
to lithologies of differing acoustic impedance than other geophysical ..."
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