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. 2018 Dec 21;10(1):3. doi: 10.3390/mi10010003

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) The viscosity ( ${\hat{μ}}_{f}$ ) and (b) the particle distance ( ${\hat{d}}_{0}$ ) estimation performance for varying signal-to-noise ratio (SNR). between 10 dB and 40 dB where $P_{f} = 20$ Pa, $d_{p} = 500$ μm, $f_{0} = 50$ Hz. (c) The decrease in estimation performance for varying where $P_{f} = 20$ Pa, $d_{p} = 300$ μm and $f_{0} = 20$ Hz.