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CPC Subgroup
G01N 29/36

Detecting the 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) > Detecting the response signal

3 direct subcodes

Child Classifications

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  • G01N 29/38 by time filtering, e.g. using time gates
  • G01N 29/40 by amplitude filtering, e.g. by applying a threshold
  • G01N 29/42 by frequency filtering