Simple Piezo Microphone
A microphone can be made by taping a piezo-sensor (PZ-01 or PZ-02) to the bottom or side of a styrofoam cup, see Figure 9. Connect the output leads of the transducer to the microphone input of a tape recorder. Speak into the cup while recording.
Acoustical Instrument Pick-up
Similar to the microphone described above, a piezo transducer may be secured to an acoustical instrument for amplification and recording. Due to the extremely low mass of the piezo-film, the acoustical impact of the transducer on the instrument is small.
Neon Piezo Demonstration
As written previously, piezo-film generates considerably high voltages when stretched. This can be demonstrated by making a simple neon bulb device (see Figure 10). A small neon bulb is soldered to the leads of a PZ-02 of PZ-03 transducer. To operate grasp the transducer between two fingers. Flick the opposite end of the transducer that teh neon bulb is soldered to (see Figure 11). The piezo-transducer generates sufficient voltage to flicker the lamp on many times and it travels to and fro. You may have to do this in a darkened room to see it because the neon lamp is very dim.
Neon bulbs have a high trigger voltage of 70 volts to light. Obviously the transducer can generate this voltage easily.
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