Ultrasonic sensors play an important role in many industrial applications as distance, proximity, level or flow sensors. By using new hardware and software techniques the accelerated development of new sensors and the improvement of known sensors on this field can be predicted. The use of ultrasonic state sensors is only beginning. New initiatives can be expected from new ideas for measurements in multicomponent systems. Acoustic microsensors are just starting to be used in industrial applications. Acoustic microsystems will play a very important role in the future.
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Hauptmann et al. (1998) studied this question.
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