Cosmonaut Voice is, in simple terms, an amplitude-driven noise generator with adjustable sensitivity, selectable noise type (beep or squelch), and an additional RFI/static noise generator.
Sets the point at which the selected voice (beep or squelch) is triggered. Turning Threshold clockwise raises the threshold and increases sensitivity (resulting in more triggering); turning Threshold counter-clockwise decreases sensitivity.
Raises or lowers the amount of RFI/static noise mixed in with the signal (independent of the Beep/Squelch or Threshold controls). Turning Noise to the right adds a more constant noise “bed” behind the Beep/Squelch effect; turning Noise to the left decreases the ambient noise, resulting in sharper Beep/Squelch cut-in.
Sets the voice mode between Beep (NASA-style radio beep) and Squelch (noise burst).