3918295 is referenced by 8 patents and cites 4 patents.

A method of nondestructively testing materials by ultrasound comprises continuously supplying a non-contact-making transmitter with electrical high-frequency power at a suitable frequency for generating ultrasound waves; amplitude-modulating with a low frequency in the transmitter and/or in a receiver the ultrasound waves generated in the transmitter and/or the signal voltage received in the receiver by the creation of a low-frequency magnetic field; and using the amplitude-modulation for separating the received signals from internal noise or external interference.

Title
Method of nondestructively testing materials by ultrasound
Application Number
05/365,324
Publication Number
3918295
Application Date
May 30, 1973
Publication Date
November 11, 1975
Inventor
Herbertz Joachim
Agent
Markva Neil F
Assignee
Raimar Pohlman
IPC
G01N 29/04
G01N 29/24
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