Wieslaw Barwicz, Andrzej Podgórski, Serghei Duminov, Roman Z. Morawski
NEW PRINCIPLE OF ACOUSTIC CALIBRATORS DESIGN
A new principle of acoustic calibrators design, based on the use of a microprocessor in the control loop of the calibrator, is presented. The mechanical and functional features of the calibrator using this principle are briefly described, and its technical specification is given. The applied algorithms of digital regulation loop and the coherent sampling of the reference signal are described in details. The carried-out experiments are presented as well as the results of the tests. The strong and the weak points of the selected solution in the relation to the traditional analogue techniques are pointed out. The conclusions concerning the practical usefulness of the developed calibrator are drawn.