2 edition of technique of comparative analysis of underwater sound transmission loss curves found in the catalog.
technique of comparative analysis of underwater sound transmission loss curves
G. R Giellis
|Statement||G.R. Giellis and B.B. Adams|
|Series||NRL report -- 8711|
|Contributions||Naval Research Laboratory (U.S.)|
|The Physical Object|
|Pagination||iii, 24 p. :|
|Number of Pages||24|
Purchase Ultrasonics International 93 - 1st Edition. Print Book & E-Book. ISBN , Book Edition: 1. Low-velocity impact damages in composite material laminates, such as matrix cracks, delaminations and fibre breakage, usually develop inside the material and can be difficult to detect. As these flaws downgrade the structural integrity of the composite, the thorough damage evaluation is essential to assess the impact damage criticality. This chapter focuses on the ultrasonic non-destructive Cited by: 2.
Optical Engineering (OE) publishes peer-reviewed papers reporting on research, development, and applications of optics, photonics, and imaging science and engineering. Ultrasound is defined by the American National Standards Institute as " sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of cm or less. A medical ultrasound result on a piece of paper. The upper frequency limit in humans (approximately 20 kHz) is due to limitations of the middle.
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Get this from a library. A technique of comparative analysis of underwater sound transmission loss curves. [G R Giellis; Naval Research Laboratory (U.S.)]. Theoretical and experimental dispersion curves were compared to verify the existence of Lamb modes and good correspondence was achieved.
and Underwater Sound. Rossing and Fletcher present the. In this paper, an ultralightweight sandwich panel with closed octahedral core is proposed, which demonstrates excellent acoustic property of sound transmission loss as well as great mechanical. The transmission loss of a uniaxial glass-reinforced-plastic panel is measured using a parametric array as an acoustic source.
Experimental results over a range of incident angles are compared with theoretical predictions calculated using a model for wave propagation in homogeneous anisotropic layered media.
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Underwater sound mitigation of bubble curtains with different bubble size distributions. Through the comparative analysis of examples, the validity and applicability of the hyperbolic model. The history of these fomulas is presented and various applications to statistics, networks, structural analysis, asymptotic analysis, optimization, and partial differential equations are discussed.
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Microstructural analysis by transmission electron microscopy revealed that the highly deformed shear-band region consisted of a gradual decrease in grain size with increasing strain. The center of the shear band is characterized by very small grains (~ μm) with a relatively low dislocation density.
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Piezoelectric elements that facilitate tiny but accurate and precise movements on (electronic. Underwater sounds 1 generated by human activities (e.g., Fig. 1) have the potential to affect aquatic animals much of the concern regarding man-made sound by regulators and others has focused upon effects on marine mammals, effects upon the vastly greater biomass of fishes and invertebrates, which provide food for the mammals (as well as for humans!), are also Cited by: 7 Aviation GIS Applications.
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