The car crash detection system needs dedicated hardware on compatible devices with watchOS 9 and iOS 16. There’s no downloadable app — either in-house or third-party — involved here. Apple says the new dual-core accelerometer packed inside the iPhone 14 is capable of measuring G-force of up to 256G magnitude, and it’s this sensor that provides the core movement data to detect if the user has been involved in an accident.
Similar is the case with the Apple Watch Series 8 and its Ultra sibling, both of which now feature upgraded accelerometer and gyroscope setup. However, the car crash detection mechanism collects data from a few more sensors to really nail things down. For example, the onboard barometer will see if the cabin pressure inside a car has suddenly changed due to the opening of airbags.
Additionally, the mic will pick up any loud noise arising from a crash-like scenario, while the GPS system will look for abnormal variations in distance covered and velocity. All this sensor data is then collectively processed by advanced motion algorithms. Once the system determines that a life-threatening incident has happened, it takes the next step of calling emergency services.
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