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Measurements
Two procedures for making signals audible can be chosen in the audio settings:
PhaseVocoder (broadband procedure):
The entire frequency range between 0 and 115 kHz is frequency-compressed. The temporal
course of the signal is preserved in the process. The procedure allows for an immediate filtering
of the auditory impression of all measured ultrasonic frequencies.
Heterodyne (mixed procedure):
With this procedure, only frequencies in a narrow frequency range around a carrier (adjustable,
for example 40 ±2 kHz) are made audible. The acoustic information of the entire signal is not
used in the process and the temporal course of the signal (volume change) is preserved.
The auditory impression differs from the PhaseVocoder procedure and also from the usual
everyday auditory impression.
For example, the procedure can be used to hide interfering signals or to separately listen to
individual frequency ranges. The carrier can be freely chosen between 20.0 kHz and 100.0 kHz
in steps of 0.5 kHz.
Adjusting the audio setting
1. Tap on the
2. Tap on the desired procedure to activate it.
3. If you have chosen the "heterodyne" audio procedure, tap on the input field for the carrier to
change the value and confirm the inputs with "Done."
4. Confirm the changes by pressing "Close" twice in order to return to the
measurement mode.
The output via headphones or via the integrated speaker is adjusted and the carrier is shown
as a line with a specification of the current value in the spectrogram.
SONOCHEK 09.2018
Important!
For recordings with the heterodyne procedure, the carrier can be
subsequently changed for the acoustic playback.
"Settings" icon and choose the menu item "Audio."
Important!
After returning to the measurement mode, the carrier can be manually
adjusted in steps of 0.5 kHz. For this purpose, you must tap above or
below the carrier lines on the touchscreen in the spectrogram.
SONOCHEK
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