In this paper the cross-correlation and phase-shift techniques are used for material thickness estimation. The cross-correlation is used to measure the time a transmitted signal takes to arrive at the receiver or the time between two successive received signals (multiple echoes). Whereas the phase-shift technique measures the time delay (less than a sine wave period) between transmitted and rec...

Email: [email protected] Introduction The process of hearing involves a complex chain of events, and each one is important to ensure the proper detection and processing of sounds. In the first step, sound waves traveling through the environment enter the ear canal and vibrate the eardrum. This energy is transmitted through the three bones of the middle ear to the inner ear. Within the inner ear, th...

This paper estimates separately the components of scattering waves generated in cylinder-body model for body area networks. For the evaluation, scattering field formulations in relation to uniform cylinderand slab-body models are provided, and the reliability of the analyses is testified by the comparison with results computed by the finite-difference time-domain (FDTD) method. Creeping waves, ...

Two other attributes of waves are the amplitude (the height of the wave crests with respect to the base line) and the phase, which measures the position of a crest with respect to some fixed point. The square of the amplitude gives the intensity of the wave: the energy transmitted per unit time). λ u ν -= A unique property of waves is their ability to combine constructively or destructively, de...

Two other attributes of waves are the amplitude (the height of the wave crests with respect to the base line) and the phase, which measures the position of a crest with respect to some fixed point. The square of the amplitude gives the intensity of the wave: the energy transmitted per unit time). λ u ν -= A unique property of waves is their ability to combine constructively or destructively, de...

AbstractIn the present paper the problem of propagation of Rayleigh waves due to a finite rigid barrier in a shallow ocean has been analyzed. The reflected, transmitted and scattered waves have been obtained by fourier transformation and Wiener-Hopf technique. Numerical computations for the amplitude of the scattered and the reflected waves have been made versus the wave number. It has been don...

[57] ABSTRACT Apparatus for and method of sensing brain waves at a position remote from a subject whereby electromag netic signals of different frequencies are simulta neously transmitted to the brain of the subject in which the signals interfere with one another to yield a waveform which is modulated by the subject’s brain waves. The interference waveform which is represen tative of the brain ...

Elastic metagratings enabling independent and complete control of both reflection transmission bulk longitudinal transverse waves are highly desired in application scenarios such as non-destructive assessment structural health monitoring. In this work, we propose a kind simply structured metagrating composed only elliptical hollow cylinders carved periodically steel background. By utilizing the...

Measurement of the transmitted intensity from a coherent monomode light source through a series of subwavelength slit arrays in Ag films, with varying array pitch and number of slits, demonstrates enhancement suppression by factors of as much as 6 9 when normalized to the transmission efficiency of an isolated slit. Pronounced minima in the transmitted intensity are observed at array pitches co...