Apparatus for generating ultrasonic fields

Apparatus for inducing elliptically polarized shear waves in an

Apparatus for measuring flow noise of water over a hydrophone

Apparatus for measuring the intensity of a seismic shock

Apparatus for microchip laser geo-sensors

Apparatus for positioning geophones in shallow holes

Apparatus for preventing turning-in and transmitter for vehicle

Apparatus for securing a ferroelectric stack to a weighted proje

Apparatus for transmitting two frequency signals with an acousti

Aquatic transducer system

Aquatic transducer system

Arrangement for determining the distance of objects

Arrangement in hydrophone

Arrangement of micromechanical ultrasound transducers

Array of capacitive micromachined ultrasonic transducer...

Assembly for use in seismic surveys of the sea bed

Asymmetrical lateral-force seismic source transducer

Audio transducer apparatus

Automatic control system for filling beverage containers

Automatic deployment of horizontal linear sensor array