Bar graph of adjustable sensitivity.
When the threshold is exceeded the application can:
* Emit a flash of light for the teacher who is usually placed behind the screen.
* Emit vibrations.
The bar graph also displays sound peaks (like a meter).
When the threshold is exceeded the application can:
* Emit a flash of light for the teacher who is usually placed behind the screen.
* Emit vibrations.
The bar graph also displays sound peaks (like a meter).
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