We thank Crampin and Gao (2005, hereinafter referred to as CG) for their interest in the analysis and results of Liu et al. (2004, hereinafter referred to as LTBZ). We disagree that the lines they draw through some of the data points of figure 14a of LTBZ (reproduced here as Fig. 1) carry quantitative scientific information, and we maintain our assessment that the results of LTBZ do not show sy...

This paper is concerned with propagation of thermoelastic longitudinal vibrations of an infinite circular cylinder, in the context of the linear theory of generalized thermoelasticity with two relaxation time parameters (Green and Lindsay theory). Three displacement potential functions are introduced to uncouple the equations of motion. The frequency equation, by using the traction free boundar...

A review is given about Lockin-Thermography, about its photoacoustic and photothermal roots, about the principle and modern applications for nondestructive testing using different kinds of options. 1. What is Lockin-Thermography? As Lockin-Thermography is based on thermal waves, a short excursion to this kind of waves and some remarks on the way they were used seems to be appropriate. Some indi...

Ultrasonic testing is a versatile and important nondestructive testing method. In many industrial applications, ultrasonic testing is carried out at relatively high temperatures. Since the ultrasonic w...