Precision Slotted-Line Impedance Measurements Using Computer Simulation for Data Correction

Clifton, B. J.

doi:10.1109/tim.1970.4313928

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Acoustic Impedance Measurement1

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2014

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“…These methods are not exactly convenient, requiring a variety of delicate corrections, and in the end, they are essentially equivalent to the slotted-line method of microwave fame, as they work back from the SWR in the guide without resolving the directional components explicitly [12]. The acoustic world is different from the EM in a number of ways.…”

Section: Acoustic Impedance Measurementmentioning

confidence: 99%

Acoustic Vector-Corrected Impedance Meter

Scott

Pennington

2014

IEEE Trans. Instrum. Meas.

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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 welldocumented methods of error correction familiar to microwave engineers, this instrument permits automated measurement of an acoustic impedance presented to a waveguide port. A dualdirectional 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.

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Section: Acoustic Impedance Measurementmentioning

confidence: 99%