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D2.03

Alarm urgency and levels

Cards in this group · 7

  1. D2.03.1Urgency should be expressed through pitch, speed, and repetition
  2. D2.03.2The number of urgency levels should not exceed discriminable range
  3. D2.03.3If every sound is equally urgent, none is
  4. D2.03.4Three to four urgency levels are common; too many become hard to distinguish
  5. D2.03.5Each level needs stable timbre and rhythm combinations, not arbitrary mixes
  6. D2.03.6Long-unhandled alarms should escalate to a higher level of expression
  7. D2.03.7Level definitions need consistency across products to avoid different meanings