What is fall detection, and how does it work?

What is fall detection?

Fall detection uses sensors and software to identify a possible fall. What happens next depends on the product: an alert may go to selected contacts or a monitoring service. A medical alert button can't help if your parent is unconscious, confused or not wearing it. Automatic detection is meant for those moments.

More than one in four adults over 65 fall each year (CDC). Falls are the most common cause of traumatic brain injuries.

Source: CDC, Facts About Falls.

How does each technology detect a fall?

Four approaches, four different mechanisms:

• Pendants with automatic detection have a motion sensor that looks for the sudden movement of a fall, plus a button as backup. They work anywhere your parent goes, but only while worn. Many end up next to the bed or on the counter.
• Smartwatches use the same accelerometer approach with extra sensors. Same catch, plus daily charging, which is one more thing to forget.
• Camera systems run computer vision on a live video feed to recognize a person going down. Nothing to wear, but your parent is on camera all day, and the rooms where cameras are unacceptable, like the bathroom, stay uncovered.
• Radar sensors use radio waves to detect movement in a room. They spot a fall by how a body moves, and they make no images. There is nothing to wear, and radar works in the dark.

What happens when a fall is detected?

Most systems work the same way. The device flags a likely fall. Many give a short window to cancel a false alarm. Then alerts go out. Systems differ in where the alert goes. Some route to a paid monitoring center that calls your parent, then you, then emergency services. Others alert the family directly through an app, and you decide what happens next.

Neither is better for everyone. A monitoring center suits a parent who is alone most of the time with no family nearby. Family alerts suit families who can respond and want to check the app before deciding what to do. Know which one you are buying, because it changes who acts first in an emergency. For the wider picture of staying aware from a distance, see how to monitor an elderly parent remotely.

How accurate is fall detection?

No fall detection system catches every fall. Real systems miss some falls and sometimes flag things that are not falls. Each type has its own weak spots. Pendants can miss a slow slide from a chair. Watches can mistake sitting down hard for a fall. Cameras can miss falls behind furniture.

Ask any company two things. How do you keep improving detection in real homes? How do you handle false alerts? A system whose false alarms are easy to review in the app, rather than triggering an ambulance dispatch, is a system a family keeps using.

Where the usual devices fall short

Every wearable only works when it is being worn. Watches need charging and pendants get forgotten. Both are often off at night, during confusion, or in the bathroom.

A sensor on the wall is meant to cover that gap, with no camera and nothing to wear. More on this in Fall detection without a camera.

How do you choose?

Start from your parent, not the spec sheet:

• Will they wear it, every day, including at night? If yes, a pendant or watch is the simple answer and works outside the home too. If no, you need something in the home that works automatically.
• Will they accept a camera? Many parents won't, and the bathroom stays uncovered regardless. If privacy is the line, radar is the automatic option that doesn't cross it.
• Where does the risk concentrate? If it's nights and the bathroom, coverage of those exact rooms matters more than anything else. See radar vs camera for that comparison in full.

See what this looks like at home

To see how Silvie works at home: Explore Silvie.