{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T05:15:33Z","timestamp":1790313333451,"version":"4.1.0"},"reference-count":27,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2012,1,31]],"date-time":"2012-01-31T00:00:00Z","timestamp":1327968000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Non-destructive methods are of great interest for the analysis of cultural heritage. Among the different possible techniques, this paper presents a low cost prototype based on the emission and reception of airborne ultrasound without direct contact with the test specimen. We successfully performed a method test for the detection of brick joints under a XVth century Renaissance fresco of the Metropolitan Cathedral of the city of Valencia (Spain). Both laboratory and in situ results are in agreement. Using this prototype system, an early moisture detection system has been installed in the dome that supports the fresco. The result is encouraging and opens interesting prospects for future research.<\/jats:p>","DOI":"10.3390\/s120201299","type":"journal-article","created":{"date-parts":[[2012,1,31]],"date-time":"2012-01-31T11:06:27Z","timestamp":1328007987000},"page":"1299-1311","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Development of a Low-Cost Airborne Ultrasound Sensor for the Detection of Brick Joints behind a Wall Painting"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7062-245X","authenticated-orcid":false,"given":"Fernando-Juan","family":"Garc\u00eda-Diego","sequence":"first","affiliation":[{"name":"Departamento de F\u00edsica Aplicada, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"},{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Unidad Asociada ICMM-CSIC\/UPV, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Mar\u00eda","family":"Bravo","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica Aplicada, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"},{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Unidad Asociada ICMM-CSIC\/UPV, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan","family":"P\u00e9rez-Miralles","sequence":"additional","affiliation":[{"name":"Servicio de Conservaci\u00f3n y Restauraci\u00f3n de la Exma, Diputaci\u00f3n de Castell\u00f3n (SCRC), Complejo Socio-Educativo de Penyeta Roja s\/n, Castell\u00f3n 12080, Spain"},{"name":"Instituto Valenciano de Conservaci\u00f3n y Restauraci\u00f3n de Bienes Culturales (IVC+R), Complejo Socio-Educativo de Penyeta Roja s\/n, Castell\u00f3n 12080, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H\u00e9ctor","family":"Estrada","sequence":"additional","affiliation":[{"name":"Centro de Tecnolog\u00edas F\u00edsicas, Unidad Asociada ICMM-CSIC\/UPV, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"},{"name":"Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, Madrid 28049, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angel","family":"Fern\u00e1ndez-Navajas","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica Aplicada, Universidad Polit\u00e9cnica de Valencia, Av. de los Naranjos s\/n, Valencia 46022, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2012,1,31]]},"reference":[{"key":"ref_1","unstructured":"Cather, S. 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