Final answer:
If the alarm sounds without intentional occlusion, the problem may be a malfunctioning sensor or a faulty wiring connection.
Step-by-step explanation:
If the alarm sounds without intentional occlusion, the problem may be caused by a malfunctioning sensor or a faulty wiring connection. A malfunctioning sensor can mistakenly detect an alarm-triggering event, leading to a false alarm. This can happen due to environmental factors like temperature changes or electrical interference. On the other hand, a faulty wiring connection can cause electrical signals to be sent to the alarm system, triggering an alarm without any intentional occlusion.