acoustic impedance

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  • noun

Synonyms for acoustic impedance

opposition to the flow of sound through a surface

References in periodicals archive ?
Acoustical impedance (figure-9) shows a nonlinearly increasing variation with an increase in molar concentration.
The difference in acoustical impedance between tissue (similar in impedance to water) and renal calculous material is sufficient enough that ultrasound waves are almost completely reflected by the calculous material and ultrasound imaging is possible.
A second characteristic of ultrasound waves is that their rate of propagation is inversely proportional to the acoustical impedance of the material through which they are transmitted.
From the experimental values a number of thermodynamic parameters, namely ultrasonic velocity, adiabatic compressibility, acoustical impedance, relaxation time, free length, free volume, internal pressure, Rao's constant, ultrasonic attenuation, cohesive energy, molar volume, and Wada's constant have been calculated.
At very low frequencies, the results are sensitive to the value of the acoustical impedance since it is difficult to measure impedance accurately below 50 Hz using ASTM E1050.