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Advances in Acoustics and Vibration
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Special Issues
Advances in Acoustics and Vibration
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2012
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Article
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Fig 5
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Research Article
Bioinspired Low-Frequency Material Characterisation
Figure 5
Frequency domain spectra for polypropylene (PP), polyvinylchloride (PVC), and brass targets, obtained using the linear frequency-modulated (LFM) chirp signal.
(a)
transmission
(b)
pulse echo