1
Herbertz Joachim: Method of nondestructively testing materials by ultrasound. Raimar Pohlman, Markva Neil F, November 11, 1975: US3918295 (8 worldwide citation)

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 receiv ...


2
Pohlmann Reimar, Herbertz Joachim: Method and apparatus for energy density measurements in standing ultrasonic wave fields. July 20, 1971: US3593818 (4 worldwide citation)

A method and apparatus for measuring the energy density in confined fluids which are excited ultrasonically. A spherical probe is immersed into the fluid with ultrasonic sensors uniformly distributed over a spherical surface, so that the sensors are located at the vertices of regular polyhedrons. Th ...


3
Pohlman Reimar, Herbertz Joachim: Apparatus and method for determining the density of ultrasonic energy in ultrasonically-energised liquid-filled spaces.. Pohlman Reimar, Herbertz Joachim, June 10, 1970: GB1194316-A (3 worldwide citation)

1,194,316. Measuring ultrasonic energy density. R. POHLMAN, and J. HERBERTZ. 18 Feb., 1969, No. 8765/69. Heading H4D. Apparatus for determining the energy density in an ultrasonically-energized volume of liquid comprises a plurality of ultrasound sensors uniformly distributed over a spherical surfac ...