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Piezo Audio Transducer

Precision Transducer for Research Data Acquisition

Convert biological signals for analysis with MP system or AcqKnowledge®

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Piezo Audio Transducer
Part #: OUT102

The OUT102 piezo transducer is very useful for providing an audible stimulus, or alarm, when a physiological signal passes a certain threshold. As such, the OUT102 makes an excellent audible BPM indicator for ECG, blood pressure, or respiration signals. The device can also be used to indicate when temperature or other slowly moving variable (e.g., electrodermal response) passes a certain thresholld. The OUT102 is typically connected directly to the STM100C stimulator module.

The following interface cables are included with the OUT102:

  • 1 x 3.5 mm cable (CBL100) for connecting the OUT102 to a Digital I/O port on the UIM100C rear panel for operation with Control Channel outputs
  • 1 x Y-Splitter (CBL212) to permit the MP System to sample the drive waveform from stimulus presentation setups; permits recording of the drive waveform timing and amplitude
  • 2 x Unisolated RJ11 to 3.5 mm Jack (CBL122)
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Part #: OUT102
Categories: Stimulation - Research
Subcategories: Auditory Stim Accessories - Research

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The threshold for the OUT102 is determined by adjusting the amplitude control on the STM100C module; the OUT102 Piezo transducer may be connected directly to the STM100C stimulator module 50 ohm output. When the STM100C stimulator module output rises above 1.5 volts, the OUT102 piezo indicator will emit a constant audible signal (3.0 kHz @ 80dB).

  • Accordingly, the device is very useful for providing an audible stimulus, or alarm, when a physiological signal passes a certain threshold. As such, the OUT102 makes an excellent audible BPM indicator for ECG, blood pressure or respiration signals.
  • The specific Biopotential or Transducer amplifier signal monitored can be recorded while simultaneously directed through the STM100C module.

The device can also be used to indicate when temperature or other slowly moving variable (e.g., electrodermal response) passes a certain threshold.

  • To operate as described here, the source amplifier needs to be set to CH16, STM100C is set to CH16 input, and source signal must be able to reach at least +1.5 V of amplitude. Source signal gain can typically be sufficiently adjusted by using the gain switch on the source amplifier module. STM100C amplitude control can be used to attenuate the source signal, as required, to help activate the Piezo transducer on only the desired source signal portions.

The OUT102 also connects directly to the UIM100C digital I/O ports for operation with Control Channel outputs. An adapter is included for connecting the OUT102 to the UIM100C digital I/O ports. With this setup, during acquisition, the stimulus level and timing will be indicated on the recording.

  • The included splitter (CBL212 3.5 mm male mono phone plug to two 3.5 mm female mono sockets) and connector cable (CBL100 3.5 mm mono male to 3.5 mm mono male) permit the analog drive signal to be directed to two locations. The drive signal—usually from DA0 or DA1—is typically directed to the splitter cable. One socket output of the CBL212 splitter cable is directed to the OUT102 input. The other socket output of the CBL212 splitter cable is looped back to drive an available MP input, via CBL100, through the UIM100C.

The OUT102 case is (W x L x H) 50.29 mm x 65.41 mm x 45.15 mm with a 1.8 m cable terminated in a 3.5 mm phone plug.

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