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Acoustic Vector-Corrected Impedance Meter
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DOI：10.1109/TIM.2014.2327474.png)
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Abstract
En 中文
We describe the development of a novel instrument intended for the measurement of the acoustical reflection coefficient of materials. The instrument effectively implements a one-port vector-corrected network analyzer in the acoustic, rather than the electromagnetic, domain. Employing the well-documented methods of error correction familiar to microwave engineers, this instrument permits automated measurement of an acoustic impedance presented to a waveguide port. A dual-directional coupler allows a working frequency range of well over an octave. In principle, a set of six couplers would allow measurement from 100 to 50 000 Hz.
Keywords:
Acoustic impedance
acoustic measurements
acoustic reflection
impedance measurement
impedance tube
network analyzer
vector correction
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