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Differential Acoustic Resonance Spectroscopy for the acoustic measurement of small and irregular samples in the low frequency range
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Differential Acoustic Resonance Spectroscopy for the acoustic measurement of small and irregular samples in the low frequency range
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Journal Article
Differential Acoustic Resonance Spectroscopy for the acoustic measurement of small and irregular samples in the low frequency range
2012
Overview
Differential Acoustic Resonance Spectroscopy (DARS) has been developed to investigate the acoustic properties of samples in the kilohertz frequency range. This new laboratory measurement technique examines the change in resonant frequencies of a cavity perturbed by the introduction of a small test sample. The resonant frequency shift between the empty and sample‐loaded cavity is used to estimate the acoustic properties of the loaded sample. This paper presents a DARS perturbation formula that combines a theoretical derivation with numerical simulation and laboratory measurements. Furthermore, a semi‐empirical calibration technique is proposed to estimate the acoustic properties of a test sample. This research demonstrates the potential of the DARS measurement technique for estimating the acoustic properties of acoustically small and/or irregularly shaped samples. Key Points Differential Acoustic Resonance Spectroscopy (DARS) is low frequency technique Frequency shift is used to estimate the acoustic properties of sample Estimate acoustic properties of acoustically small or irregular shaped samples
Publisher
Blackwell Publishing Ltd,American Geophysical Union
Subject
