Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: Poster: New Instruments and Methods

CPP 11.1: Poster

Montag, 14. März 2011, 17:30–19:30, P2

Acoustical Characterization of PVDF-Transducers for Experiments on Musical Instruments — •Marcel Kappel, Gunnar Gidion, and Reimund Gerhard — University of Potsdam, Institute of Physics and Astronomy

Polyvinylidene fluoride (PVDF) has long been known for its flexibility in applications, which is based on its robustness and variable sensor geometry. Since the acoustical impedance is similar to that of materials like plastic and wood, it can be used for non-invasive investigations of vibrating systems for instance in musical instruments. Measurements of the piezoelectric coefficient of the PVDF-sensor were carried out with respect to important parameters such as static pressure, amplitude of the dynamical force, and long term stability. In addition, we determined the frequency response of the piezoelectric polymer as sensor and actuator. Thus, we are capable of using these transducers on two different musical instruments and compare the results with the airborne sound recorded simultaneously by a condensor microphone. These measurements can hold as a showcase for the application of PVDF-sensors in vibrating systems and material science in general.