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impedance
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impedance

Total opposition of a circuit to the passage of alternating electric current. It includes the resistance R and the reactance X (caused by capacitance or inductance); the impedance can then be found using the equation Z2 = R2 + X2.
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Delany and Bazley presented empirical formulations for estimating acoustic impedance of porous materials.
Synthesis and characterization of open-cell foams for sound ... by Chu, Raymond K.M.; Naguib, Hani E.; Atalla, Noureddine / Polymer Engineering and Science
The Chung and Blaser transfer function method is the primary technique used today for directly measuring acoustic impedance.
Experimental investigation of reflection of airborne noise at duct ... by Michaud, Alexander P.; Cunefare, Kenneth A. / ASHRAE Transactions
95 Paperback QC225 Written for physics majors, this undergraduate textbook introduces particle vibration theory and characterizes plane waves in the air, acoustic impedance, the behavior of waves in solids, the reflection and absorption of sound waves, and methods of sound measurement.
An introduction to acoustics. (reprint, 1951) by SciTech Book News
 
 
 
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