acoustic impedance

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Noun1.acoustic impedance - 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
resistance - any mechanical force that tends to retard or oppose motion
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References in periodicals archive ?
Pre-stack inversion is usually used to discriminate fluid when the shear impedances (Zs), acoustic impedance (Zp), and the ?
These transducers are made using piezoelectric composite and a stack of resonant and non-resonant matching layers to match the transducer acoustic impedance to the air, canter frequency is 0.65 MHz and bandwidth at -20 dB in thru-transmission mode is 90 %.
Testing elastomers and TPEs at these rates is difficult; the low sample forces, low density and low wave speed (or acoustic impedance) make testing more difficult.
Conventional acoustic impedance (AI) inversion, which is the product of P-wave velocity and density, assumes that the P-wave strikes the subsurface interfaces at normal incidence (Lindseth, 1979).
The specific acoustic impedance of a short tube (single MPP hole) is defined as
Similarly, acoustic impedance [Z.sub.a] describes the relationship between the sound pressure and the particle velocity, which is given by
The acoustic impedance of the material is the mechanical impedances of certain materials inside the medical ultrasound transducers, and this value represents the amount of acoustic (ultrasound) energy transmitted or reflected through a certain medium towards the target [2].
In the present paper an attempt has been made to calculate adiabatic compressibility, acoustic impedance, intermolecular free length, and relaxation time by using measured values of ultrasonic velocities, densities, and viscosities at concentration range of 1.0%, 0.8%, 0.6%, 0.5%, 0.4%, and 0.3% at 35[degrees] C temperature.
Specifically, these components will differ from those in previous lots in two material characteristics: the acoustic impedance of the mold compound and the acoustic attenuation of the mold compound.
It may be applied for measuring attenuation, acoustic impedance, and other physical and elastic properties of biological tissues at the microscopic level.
In this research work, the adopted methodology is based upon the combination of seismic attributes, acoustic impedance, processed logs and artificial neural network training (Basu and Verma, 2013).