Experimentelle Untersuchung akustischer Resonanzen in eindimensionalen Wellenträgern mit Smartphone und Tablet-PC Experimental investigation of acoustical resonances in one-dimensional shaft carriers with Smartphone and Tablet-PC

From a technical point of view, the wide spectrum of internal sensors in smartphones/tablet-PCs and the availability of appropriate applications (Apps) allow to perform manifold measurements with sufficient accuracy. Many traditional computer-assisted experiments can also be conducted with these mobile devices, but with less experimental effort. Especially in acoustics, loudspeaker, microphone and adequate apps enable learners to generate and detect sound between 20 Hz and 24 kHz and to display and analyze sonic quantities in real time. From an educational point of view, smartphones/tablet-PCs are intuitive and powerful experi- mental tools with high motivational potential. Especially learner's opportunities for autonomous experimentation are increased. Using the example of acoustical resonances in one-dimensional finite air columns and metal rods, we present experiments for school and university with smartphones/tablet-PCs and appropriate tested apps. In addition, we investigate the velocity of sound in air as a function of temperature qualitatively and quantitatively, and determine the velocity of sound in stainless steel. Finally, the experiments are classified and discussed under educational aspects.

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