scholarly journals Reverberation time and audibility in phased geometrical acoustics using plane or spherical wave reflection coefficients

2019 ◽  
Vol 145 (3) ◽  
pp. 1888-1888
Author(s):  
Matthew Boucher ◽  
Monika Rychtarikova ◽  
Lukas Zelem ◽  
Bert Pluymers ◽  
Wim Desmet
Keyword(s):  
Wave Reflection ◽  
Spherical Wave ◽  
Reflection Coefficients ◽  
Reverberation Time ◽  
Geometrical Acoustics

scholarly journals Reverberation time and audibility in phased geometrical acoustics using plane or spherical wave reflection coefficients

2019 ◽  
Vol 145 (4) ◽  
pp. 2681-2690
Author(s):  
Matthew A. Boucher ◽  
Monika Rychtarikova ◽  
Lukáš Zelem ◽  
Bert Pluymers ◽  
Wim Desmet
Keyword(s):  
Wave Reflection ◽  
Spherical Wave ◽  
Reflection Coefficients ◽  
Reverberation Time ◽  
Geometrical Acoustics

Fast computation of seabed spherical-wave reflection coefficients in geoacoustic inversion

2015 ◽  
Vol 138 (4) ◽  
pp. 2106-2117 ◽  
Author(s):  
Jorge E. Quijano ◽  
Stan E. Dosso ◽  
Jan Dettmer ◽  
Charles W. Holland
Keyword(s):  
Wave Reflection ◽  
Spherical Wave ◽  
Reflection Coefficients ◽  
Fast Computation ◽  
Geoacoustic Inversion

Efficient geoacoustic inversion of spherical-wave reflection coefficients for muddy seabeds

2015 ◽  
Vol 137 (4) ◽  
pp. 2284-2284
Author(s):  
Jorge E. Quijano ◽  
Stan E. Dosso ◽  
Jan Dettmer ◽  
Charles W. Holland
Keyword(s):  
Wave Reflection ◽  
Spherical Wave ◽  
Reflection Coefficients ◽  
Geoacoustic Inversion

Comparison of surface-wave reflection coefficients for different metals on quartz

1973 ◽  
Vol 9 (21) ◽  
pp. 495 ◽  
Author(s):  
R. Larosa ◽  
C.F. Vasile ◽  
D.V. Zagardo
Keyword(s):  
Surface Wave ◽  
Wave Reflection ◽  
Reflection Coefficients

Damage Assessment of Beams Using Flexural Wave Reflection Coefficients

2007 ◽  
Vol 347 ◽  
pp. 193-198 ◽  
Author(s):  
Simon P. Shone ◽  
Brian R. Mace ◽  
Tim P. Waters
Keyword(s):  
Damage Assessment ◽  
Wave Reflection ◽  
Experimental Results ◽  
Flexural Wave ◽  
Reflection Coefficients ◽  
Wave Power ◽  
Spring Model ◽  
Low Frequencies ◽  
Experimental Errors ◽  
Ill Conditioning

The wave reflection coefficients of damage such as cracks, notches and slots in otherwise uniform beams depend on frequency and on the size of the damage. Experimental results are presented for the wave power reflection coefficients of transverse slots of various depths sawn into a number of beam specimens. These results are compared with a conventional spring model to estimate the depth of the slot. The method appears to work well for larger slot depths (greater than about 30% of the thickness of the beam) and at higher frequencies, allowing their existence to be inferred and their size to be estimated. This is due to the fact that the reflection coefficients are larger in these regimes. For smaller slots or at low frequencies, noise and experimental errors, such as miscalibration errors and ill-conditioning, become more significant.

The attentuation of compression waves in lossy media*

1956 ◽  
Vol 46 (1) ◽  
pp. 47-56
Author(s):  
L. Knopoff
Keyword(s):  
Spherical Wave ◽  
Multiple Reflection ◽  
Reflection Coefficients ◽  
Lithium Sulfate ◽  
Seismic Modeling ◽  
Wave Fronts ◽  
Loss Mechanism ◽  
Compression Waves ◽  
Lossy Media ◽  
Internal Viscosity

ABSTRACT By means of modeling experiments on a wax slab, oil-coupled lithium sulfate transducers are found to have excellent directional properties as seismic modeling transducers. Investigation of the several orders of multiple reflection amplitudes shows that consistency in the measured reflection coefficients for the spherical wave fronts is easily achieved if a loss mechanism of the internal viscosity type is attributed to the wax.

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