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    Author(s): C. Adam Senalik; Lujing Zhou; Robert J. Ross
    Date: 2017
    Source: In: Wang, X.; Senalik, C.A.; Ross, R.J., eds. Proceedings, 20th international nondestructive testing and evaluation of wood symposium. Gen. Tech. Rep. FPL-GTR-249. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 298-310.
    Publication Series: Paper (invited, offered, keynote)
    Station: Forest Products Laboratory
    PDF: Download Publication  (4.0 MB)

    Description

    The research reported here focuses on the use of time and frequency domain analysis techniques for assessing the internal condition of timbers. Several large timbers obtained from a historic public viewing tower were evaluated with acoustic-based nondestructive testing techniques. Waveforms were captured and analyzed using both time and frequency domain techniques. The slope of the phase with respect to frequency shows potential to be a metric that is more sensitive to the presence of internal decay than time of flight.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Senalik, C. Adam; Zhou, Lujing; Ross, Robert J. 2017. Assessment of deterioration in timbers with time and frequency domain analysis techniques. In: Wang, X.; Senalik, C.A.; Ross, R.J., eds. Proceedings, 20th international nondestructive testing and evaluation of wood symposium. Gen. Tech. Rep. FPL-GTR-249. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 298-310.

    Keywords

    Timber, deterioration, acoustic signals, time domain, frequency domain, phase

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https://www.fs.usda.gov/treesearch/pubs/57659