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- W4243485128 abstract "The inspection of composite agglomerate materials is usually performed by using low-frequency ultrasound in order to overcome scattering problems during the characterization measurements. In this work we describe a low-frequency method for thickness measurements of refractory linings, based on the pulse-echo technique and performed by using two unimodal array transducers. Each array is constituted by three PZT5 piezoceramic elements having a resonance frequency of about 38 kHz. The problem of the acoustic coupling between the transmitter and the receiver, due to the presence of a strong surface acoustic wave that masks the bulk-wave information, has been solved by properly choosing the geometrical configuration and the separation. The proposed method gives good results for the thickness measurement with a mean error of about 10%." @default.
- W4243485128 created "2022-05-12" @default.
- W4243485128 date "1972-07-01" @default.
- W4243485128 modified "2023-09-27" @default.
- W4243485128 title "Underwater acoustics - a report by the neutral environmental research council working group on underwater acoustics" @default.
- W4243485128 doi "https://doi.org/10.1016/0041-624x(72)90363-0" @default.
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