I Made a Quieter Air Purifier
2 days ago
- #Air Purification
- #DIY
- #Noise Reduction
- DIY air purifiers can reduce disease transmission at a lower cost but are often too loud, leading people to turn them off.
- The effectiveness of an air purifier is not just about its cleaning power but also about how quiet it is, as quieter purifiers are more likely to be left on longer.
- A prototype was built using PC cooling fans and insulation foam to create a quieter air purifier compared to the standard Lasko box fan CR box.
- The PC fan CR box performed comparably to the Lasko CR box on its lowest setting without a shroud and was quieter by about 3 decibels, with less high-pitch noise.
- Fan noise originates from blade-air interactions, motor noise, and mechanical parts, with blade-air interaction noise being the most complex, involving droning tones and broadband noise.
- The prototype's design aimed to minimize noise by leveraging PC fans optimized for quietness and using foam for sound damping.