Final answer:
An alarm clock for a blind person should combine tactile controls, auditory feedback, and possibly olfactory cues. It should employ auditory signals to communicate the time and alarm settings, maintain a regular circadian rhythm with specific features, and offer multisensory options for waking up.
Step-by-step explanation:
Designing an alarm clock for a blind person requires a specialized approach that prioritizes accessibility and ease of use. Such a design would typically involve tactile controls, auditory feedback, and possibly even olfactory cues. For setting and indicating the time, distinct, easily distinguishable auditory signals could be used. The alarm could offer varied sounds or even voice alerts to inform the user not only when the alarm is going off but also of the current time when a button is pressed. Accessibility features might also include a way to adjust settings such as alarm volume or snooze duration through tactile means such as raised dots or unique button shapes. This can be combined with principles from the provided reference to maintain a regular circadian cycle, including options for gradual increases in sound or vibration intensity to gently wake the user without abruptness. Furthermore, the alarm clock could sync with other sensory devices, offering exposure to bright light or even gentle vibrations as additional wake-up options for the user. In conclusion, design should focus on multisensory and intuitive interactions that cater to the needs of visually impaired users.