CPC Subgroup
G01N 29/44 Processing the detected response signal
Full Title
Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object (G01N3/00 - G01N27/00 take precedence) > Processing the detected response signal
11 direct subcodes
Child Classifications
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- G01N 29/46 by spectral analysis, e.g. Fourier analysis
- G01N 29/48 by amplitude comparison
- G01N 29/50 using auto-correlation techniques or cross-correlation techniques
- G01N 29/52 using inversion methods other that spectral analysis, e.g. conjugated gradient inversion