It is well known that time-frequency analysis (TFA) characterises signals in time-frequency
plane. Theoretically, traditional non-parameterised TFA can analyze any signal, but it is …

Classical ocean acoustic experiments involve the use of synchronized arrays of sensors.
However, the need to cover large areas and/or the use of small robotic platforms has evoked …

The ultrasonic guided wave has emerged as a promising tool for structural health monitoring
(SHM) and nondestructive testing (NDT) due to their capability to propagate over long …

Ultrasonic Lamb modes typically propagate as a combination of multiple dispersive wave
packets. Frequency components of each mode distribute widely in time domain due to …

The 2-D Fourier transform analysis of multichannel signals is a straightforward method to
extract the dispersion curves of guided modes. Basically, the time signals recorded at …

A method for impact location in plate-like structures is proposed. The approach is based on
guided waves dispersion compensation. Procedures based on dispersion compensation are …

A strategy for the localization of acoustic emissions (AE) in plates with dispersion and
reverberation is proposed. The procedure exploits signals received in passive mode by …

Quantitative ultrasound has great potential for assessing human bone quality. Considered
as an elastic waveguide, long bone supports propagation of several guided modes, most of …

Dispersion curves play a relevant role in nondestructive testing. They provide estimations of
the elastic and geometrical parameters from experiments and offer a better perspective to …

Time of flight (ToF) based method for damage detection using Lamb waves is widely used.
However, due to the energy dissipation of Lamb waves and the non-ignorable size of …