Low-frequency magnetic fields can impact electronic devices, inducing unwanted current flows in sensitive paths that can add noise, introduce errors, and otherwise disrupt carefully balanced circuits. While the result in consumer systems such as cell phones and computers might not rise beyond poor communications and lost data, the impact in other systems can be devastating. In automotive systems, for example, lack of proper shielding can have catastrophic effects when magnetically sensitive sensors, such as Hall-effect sensors used in anti-lock braking systems, fail to operate as expected.
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