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Abstract
The dynamic pressure generator under discussion consists of two, face-to-face-orientated electrodynamic loudspeakers and the air chamber between. The aim of this paper is to investigate the static and dynamic characteristics of this pressure generator. Physical modelling and an experimental analysis were employed to demonstrate its capabilities and limitations. The generator's static sensitivity, which was defined by the ratio between the generated pressure and the excitation electric current, mainly depends on the ratio between the force factor and the effective area of the loudspeakers. The presented system has relatively good precision and stability, and a small sensitivity to changes in the internal volume. Its dynamic characteristics are defined by the properties of the loudspeaker diaphragm, the air chamber between the loudspeakers and the connection of the device under test to the pressure generator.
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