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Tag: HEPA filters

under the microscope

A new adjustable filter that could enable the next generation of wireless communications.

September 14, 2024

“Wireless devices use different filters for different frequencies, with the effect that covering all frequencies or bands requires large numbers of filters that take up substantial space. (The typical smartphone includes upwards of 100 filters, to ensure that signals from […]

to your health

Experiments on a $50 DIY air purifier you can make in 30 seconds.

September 13, 2021

“If you’re in a hurry, this post says that if you strap two HEPA filters to a box fan, it will clear the air of basically all the particles we can measure, and it will do it faster than a […]

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