Relationship between wood density and ultrasound propagation velocity : a non-destructive evaluation of waterlogged archaeological wood state of preservation based on its underwater acoustic properties
With current progress in marine geophysics equipment, survey and processing techniques, we can be now closer to support needs emerging after decades of maritime archaeology and conservation practice worldwide. Acoustics have been suggested as an appropriate non-intrusive method for investigating marine archaeological sites and as a proxy for degradation of submerged archaeological timbers whilst in situ. The present study has significantly contributed to the use of ultrasound by conservators and archaeologists in the field of Maritime Archaeology. A new scientific way has been developed to evaluate the degree of degradation of waterlogged archaeological wood, using a reliable relationship between its physical properties during degradation and its corresponding acoustical properties. For this purpose a new reliable experimental ultrasound set-up and measurement methodology were first developed, followed by initial experiments on âfreshâ waterlogged wood, degraded with a new artificial degradation process simulating closely the degradation patterns of wood recovered from marine environments. These experiments led to the establishment of reliable calibration curves between woodâs density and ultrasound
Zisi, Angeliki
Relationship between wood density and ultrasound propagation velocity : a non-destructive evaluation of waterlogged archaeological wood state of preservation based on its underwater acoustic properties. With current progress in marine geophysics equipment, survey and processing techniques, we can be now closer to support needs emerging after decades of maritime archaeology and conservation practice worldwide. Acoustics have been suggested as an appropriate non-intrusive method for investigating marine archaeological sites and as a proxy for degradation of submerged archaeological timbers whilst in situ. The present study has significantly contributed to the use of ultrasound by conservators and archaeologists in the field of Maritime Archaeology. A new scientific way has been developed to evaluate the degree of degradation of waterlogged archaeological wood, using a reliable relationship between its physical properties during degradation and its corresponding acoustical properties. For this purpose a new reliable experimental ultrasound set-up and measurement methodology were first developed, followed by initial experiments on âfreshâ waterlogged wood, degraded with a new artificial degradation process simulating closely the degradation patterns of wood recovered from marine environments. These experiments led to the establishment of reliable calibration curves between woodâs density and ultrasound
relationship wood density propagation velocity non_destructive evaluation waterlogged archaeological wood state preservation base underwater acoustic property current progress marine geophysics equipment survey processing technique close support need emerge decade maritime_archaeology conservation practice worldwide suggest appropriate non intrusive method_investigate marine archaeological_site proxy degradation submerge_archaeological timber whilst situ present_study significantly contribute use conservator archaeologist field maritime_archaeology new scientific way develop evaluate degree degradation waterlogged archaeological wood use reliable relationship physical_property degradation correspond property purpose new reliable experimental set measurement first develop follow initial fresh waterlogged wood degrade new artificial degradation process simulate closely degradation pattern wood recover marine environment lead_establishment reliable calibration curve wood density