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Identifying subsurface detachment defects by acoustic tracing
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SYSNO ASEP 0396275 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Identifying subsurface detachment defects by acoustic tracing Author(s) Sklodowski, R. (PL)
Drdácký, Miloš (UTAM-F) RID, SAI, ORCID
Sklodowski, M. (PL)Number of authors 3 Source Title NDT & E International. - : Elsevier - ISSN 0963-8695
Roč. 56, June (2013), s. 56-64Number of pages 9 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords acoustic excitation ; plaster detachment defects ; frequency response ; inspection systems ; signal processing Subject RIV JN - Civil Engineering R&D Projects GBP105/12/G059 GA ČR - Czech Science Foundation (CSF) Institutional support UTAM-F - RVO:68378297 UT WOS 000318193400007 EID SCOPUS 84875453637 DOI 10.1016/j.ndteint.2013.02.002 Annotation This paper presents a newly developed acoustic tracing method for a non-invasive survey of detachment defects of rendered masonry. The method analyses acoustic signals generated by tapping the surface in densely located points, which are registered together with the geometrical coordinates by means of a video camera. FFT analysis enabled a comparison to be made between the audible wall response and formalized parameters of the sound samples, i.e. the excitation band and the dominant frequency of the spectrum. It was concluded that the audible spectrum for non-detached parts includes several narrow band components, whilst the detached areas respond in a wider frequency band. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2014
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