Protects your stuff from EM radiation and stuff, but is this really a concern in e.g. a PlayStation 2? Are they a relic from the past? Is there any proof of them harming electronics?
In: Technology
The government has very strict regulations on the amount of electromagnetic noise that a device can emit. This is to ensure that your electronics don’t disrupt the function of other devices.
The metal shields help to reduce emissions from noisy subassemblies in the unit – usually a switching power supply or processor. [source: part of my job is to take consumer electronics products to FCC/CE testing labs]
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