A-Scan is a testing method that displays ultrasonic echo signals in a waveform format, with the horizontal axis representing the time or depth of sound wave propagation and the vertical axis representing the amplitude of the echo signal. When ultrasonic waves encounter defects (such as delaminations or voids) or interfaces inside a material, reflected signals are generated, appearing as peaks at different positions and amplitudes on the A-Scan waveform. By analyzing the position and amplitude of these peaks
Source: NDT
