3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery: The Grace Dieu

R. M. K. Plets, J. K. Dix, J. R. Adams, A. I. Best

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Acoustic imaging and characterisation of buried objects (and in particular archaeological materials) in shallow-water (<5 m) is often unsuccessful owing to problems related to vessel-induced bubble turbulence and the restricted acoustic geometry of the system. A 2D surveying method that tackles these problems has been tested on the known wreck of the Grace Dieu (1418), Henry V's flagship, currently buried within the inter-tidal sediments of the Hamble River. The wooden hull is recognisable in the seismic sections as a high amplitude anomaly underlain by an acoustic blanking zone. Close survey line spacing (ca. 1 m) allowed the construction of time slices, identifying the ovate plan of the hull. High, predominantly negative, reflection coefficients suggest this anomaly corresponds to degraded oak timbers buried within the sediment. Combining the data enabled the construction of a (pseudo)-3D image, revealing the dimensions and shape of the hull remains for the first time. (C) 2007 Elsevier Ltd. All rights reserved.
    LanguageEnglish
    Pages399-411
    JournalApplied Acoustics
    Volume69
    Issue number5
    Early online date8 Jun 2007
    DOIs
    Publication statusE-pub ahead of print - 8 Jun 2007

    Fingerprint

    acoustic imagery
    hull
    acoustics
    anomaly
    wreck
    sediment
    surveying
    bubble
    timber
    spacing
    vessel
    shallow water
    turbulence
    geometry
    river
    archaeological site

    Cite this

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    title = "3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery: The Grace Dieu",
    abstract = "Acoustic imaging and characterisation of buried objects (and in particular archaeological materials) in shallow-water (<5 m) is often unsuccessful owing to problems related to vessel-induced bubble turbulence and the restricted acoustic geometry of the system. A 2D surveying method that tackles these problems has been tested on the known wreck of the Grace Dieu (1418), Henry V's flagship, currently buried within the inter-tidal sediments of the Hamble River. The wooden hull is recognisable in the seismic sections as a high amplitude anomaly underlain by an acoustic blanking zone. Close survey line spacing (ca. 1 m) allowed the construction of time slices, identifying the ovate plan of the hull. High, predominantly negative, reflection coefficients suggest this anomaly corresponds to degraded oak timbers buried within the sediment. Combining the data enabled the construction of a (pseudo)-3D image, revealing the dimensions and shape of the hull remains for the first time. (C) 2007 Elsevier Ltd. All rights reserved.",
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    3D reconstruction of a shallow archaeological site from high-resolution acoustic imagery: The Grace Dieu. / Plets, R. M. K.; Dix, J. K.; Adams, J. R.; Best, A. I.

    In: Applied Acoustics, Vol. 69, No. 5, 08.06.2007, p. 399-411.

    Research output: Contribution to journalArticle

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    AU - Plets, R. M. K.

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    AU - Best, A. I.

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    AB - Acoustic imaging and characterisation of buried objects (and in particular archaeological materials) in shallow-water (<5 m) is often unsuccessful owing to problems related to vessel-induced bubble turbulence and the restricted acoustic geometry of the system. A 2D surveying method that tackles these problems has been tested on the known wreck of the Grace Dieu (1418), Henry V's flagship, currently buried within the inter-tidal sediments of the Hamble River. The wooden hull is recognisable in the seismic sections as a high amplitude anomaly underlain by an acoustic blanking zone. Close survey line spacing (ca. 1 m) allowed the construction of time slices, identifying the ovate plan of the hull. High, predominantly negative, reflection coefficients suggest this anomaly corresponds to degraded oak timbers buried within the sediment. Combining the data enabled the construction of a (pseudo)-3D image, revealing the dimensions and shape of the hull remains for the first time. (C) 2007 Elsevier Ltd. All rights reserved.

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