Multimicrophone Measurement of Semi-Active Samples in an Acoustic Tube

Abstract:

The sample of a piezoelectric semi-active shunt damping material is analyzed inside an acoustic tube. The measurement of reflected and transmitted acoustic wave through the sample is realized using 4-microphone measurement method. Acoustic properties of the sample with the emphasis on acoustic transmissibility are analyzed. The composite piezoelectric sample comprising of a piezoelectric material connected to a linear shunting circuit is described, also the multimicrophone measurement methods are described in detail and the results are discussed in context of semi-active sound damping.

• Periodical: Materials Science Forum (Volume 919)
• Pages: 386-395
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.919.386
• Online since: April 2018
• Authors: Michal Kašpárek*, Martin Černík, Jana Urbánková, Pavel Mokrý
• Keywords: Acoustic Impedance Tube, Acoustic Transmission, Four-Microphone Method, Negative Impedance Converter, Piezoelectric Shunt Damping, Semi-Active Shunt Damping

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