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volume on your phone or tablet down so as to avoid
acoustic feedback affecting the test.
5.
Drag the slider to maximize the size of the red waveform
at the top of the screen.
6.
Point the acoustic horn of the
Echo Meter Touch directly at
the calibrator speaker.
7.
Observe the waveform
level on the screen. Move the
Echo Meter Touch around until
the waveform is maximized.
There is variation in
microphone sensitivity between
units an calibrators so you may
see a larger waveform, but a
microphone is good if the
waveform takes up more than
¼ of the waveform panel.
4.2
Chirp Mode System Testing
To test the entire system, use the Ultrasonic Calibrator in Chirp
mode to emit loud ultrasonic signals that can be picked up by
the Echo Meter Touch from some distance. This can be used to
verify all triggering and recording functions.