IPT 2018
Open Access

Fig. 8


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Amplification (in dB) is plotted as function of the frequency at which a piezoelectric transducer excites the membrane. Amplification was derived from the difference of amplitude between the transducer vibrating alone and its action as it was put on the balloon. For convenience, a sweep of frequencies was performed. The distance to the microphone remains constant between the two sound samples.

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