Scott, J. B., & Pennington, K. (2014). Acoustic Vector-Corrected Impedance Meter. IEEE Transactions on Instrumentation and Measurement, 63(12), 2726–2732. http://doi.org/10.1109/TIM.2014.2327474
Permanent Research Commons link: http://hdl.handle.net/10289/8883
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 50000 Hz.
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