Measure and record target effects

Attach the accelerometer to the DUT.

• Use beeswax to attach the accelerometer at the location specified in the test app.

• The accelerometer connection should be rigid but also easy to remove between runs.

Set the orientation of the accelerometer depending on the actuator type.

• X axis linear resonant actuator (LRA): Make sure that the -> on the accelerometer is aligned with the length direction of the LRA. This direction is generally equivalent to the resonating direction.

• Z axis linear resonant actuator (LRA): Use the accelerometer orientation described in the X axis LRA instructions above.

• Eccentric rotating mass actuator (ERM): Measure the signal and all three axes, then select the data that has the strongest signal amplitude.

Open the test app on the DUT and generate target effects.

• Use a Bluetooth mouse to click the target buttons in the app. This lets you click app buttons without adding external forces, such as pressure from a finger.

  

  Figure 1. DUT generating target effects

Record the waveform from the test app using Audacity and export the file:

• Click Record in Audacity.
• Press each of the target buttons in the test app.

• Export the recording as a WAV file.

  

  Figure 2. Exporting from Audacity