Abstract:
A new approach using signal averaging and signal processing is described for measuring ultrasonic attenuation of compressional (P) and shear (S) waves in highly attenuati...Show MoreMetadata
Abstract:
A new approach using signal averaging and signal processing is described for measuring ultrasonic attenuation of compressional (P) and shear (S) waves in highly attenuative (low Q) materials. Broadband ultrasonic pulses in the frequency range of 0.7-1.1 MHz are transmitted through a specimen to be characterized for comparison to a reference with low dissipation. Attenuation is calculated from the ratio of spectral amplitudes which are corrected for diffraction effects. An experimental example is given based upon measurements made on dry polycrystalline sodium chloride (halite or rock salt) from Avery Island, LA. The measured QP of compressional waves is 46 ± 5.5 and QS of shear waves is 12 ± 0.3. This is a through transmission technique which gives results for materials so lossy that multiple echoes cannot be detected.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: GE-19, Issue: 2, April 1981)
References is not available for this document.
Select All
1.
O. R. Gericke, "“Determination of the geometry of hidden defects by ultrasonic pulse analysis testing”", J. Acoust. Soc. Amer., vol. 35, pp. 364-368, 1963.
2.
W. Sachse, "“Ultrasonic spectroscopy of a fluid-filled cavity in an elastic solid”", J. Acoust. Soc. Amer., vol. 56, pp. 891-896, 1974.
3.
Y. Pao and W. Sachse, "“Interpretation of time records and power spectra of scattered ultrasonic pulses in solids”", J. Acoust. Soc. Amer., vol. 56, pp. 1478-1486, 1974.
4.
L. Adler and D. Lewis, "“Scattering of a broadband ultrasonic pulse by discontinuities”", IEEE Trans. Sonics Ultrason., vol. SU-23, pp. 351-356, 1976.
5.
A. F. Brown and J. P. Weight, "“Generation and reception of wideband ultrasound”", Ultrasonics, vol. 12, pp. 161-167, 1974.
6.
E. Papadakis, "“Ultrasonic attenuation caused by scattering in polycrystalline metals”", J. Acoust. Soc. Amer., vol. 37, pp. 711-717, 1965.
7.
T. Plona and L. Tsang, "“Characterization of the average microscopic dimension in granular media using ultrasonic pulses: Theory and experiments”" in Soc. Explor. Geophys., pp. 38-39, Oct. 1978.
8.
R. K. Elsley, B. R. Tittman, H. L. Nadler and L. A. Ahlberg, "“Defect characterization by ultrasonic signal process techniques”", Proc. Ultrasonics Symp., pp. 48-52, 1977.
9.
L. L. Lacy and A. C. Daniel, "“Measurements of ultrasonic velocities using a digital averaging technique”", J. Acoust. Soc. Amer., vol. 52, pp. 189-195, 1972.
10.
R. Lepper, R. Reuter and H. Trier, "“Digitization of high-frequency ultrasonic signals for tissue differentiation in opthamology”" in Biomed. Tech., Germany, vol. 23, pp. 75-78, 1978.
11.
F. Press, "“Seismic wave attenuation in the crust”", J. Geophys. Res., vol. 69, pp. 4417-4418, 1964.
12.
R. W. Ward and M. N. Toksöz, "“Cause of regional variation of magnitude”", Bull. Seis. Soc. Amer., vol. 61, pp. 649-670, 1971.
13.
S. S. Bor, S. D. Malone and S. W. Smith, "“A spectral ratio technique for estimating the characteristics of seismic attenuation for Eastern Washington”", EOS Trans. Amer. Geophys. Union, vol. 59, pp. 237, 1978.
14.
M. N. Toksöz, D. H. Johnston and A. Timur, "“Attenuation of seismic waves in dry and saturated rocks: I. Laboratory measurements”", Geophysics, vol. 44, pp. 681-690, 1979.
15.
F. D. Stacey, M. T. Gladwin, B. McKavanagh, A. T. Linde and L. M. Hastie, "“Anelastic damping of acoustic and seismic pulses”", Geophysical Surveys, vol. 2, pp. 133-151, 1975.
16.
H. Seki, A. Granato and R. Truell, "“Diffraction effects in the ultrasonic field of a piston source and their importance in the accurate measurement of attenuation”", J. Acoust. Soc. Amer., vol. 28, pp. 230-238, 1956.
17.
E. P. Papadakis, "“Ultrasonic diffraction from single apertures with application to pulse measurements and crystal physics”" in Physical Acoustics, New York:Academic Press, vol. XI, pp. 151-211, 1975.
18.
P. Mattaboni and E. Schreiber, "“Method of pulse transmission measurements for determining sound velocities”", J. Geophys. Res., vol. 72, pp. 5160-5163, 1967.
19.
J. Zamanek and J. Rudnick, "“Attenuation and dispersion of elastic waves in a cylindrical bar”", J. Acoust. Soc. Amer., vol. 33, pp. 1283-1288, 1961.
21.
Sodium Chloride, New York:Reinhold Publishing, pp. 362-368, 1960.
