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by mclovinit
3728 days ago
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That last point is interesting. Even with an RF detector, an accelerometer may act as a cheap room bug. Heck, if automobiles use them to detect when an airbag should be deployed, why not just use them as bugs in cars? Now I'm scaring myself. |
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AFAIK the airbag accelerometers are designed to detect much larger accelerations than e.g. the ones in a smartphone, and are thus essentially completely insensitive to anything lesser than a huge impact -- spurious airbag inflation is one of the things the manufacturers really, really don't want to happen.
Many of them are just mechanical switches actuated by a weight, with no active electronics (makes sense for such a safety device to be as simple as possible): https://www.youtube.com/watch?v=mWSlwhYyOhI
And even when not impacting anything, a car is not exactly a quiet and vibration-free environment either...