Air Purifiers as White Noise Machines
This article explores the dual utility of air purifiers as both air quality improvement devices and white noise machines. It compares different models based on their noise levels, air cleaning capacity, and cost-effectiveness for home use.
Why it matters
It provides practical advice for consumers looking to optimize home environments for both health and sleep quality.
Instead of spinning a fan in free air to make noise, you can have it pull air through a filter. A small purifier sounds a lot like a classic noise machine, is only a bit larger and more expensive, and removes smoke and infectious particles from the air. For example, here's a $47 purifier with a 6.5" diameter, cleaning 34 cubic feet of air per minute ("CADR") at 45dB. For most circumstances where someone would use a white noise machine, this kind of small purifier is all-around better.
Now, 34 CFM is not very much air cleaning. I usually run an AirFanta 3Pro and it cleans ~6x more air for the same amount of noise, or ~12x more air with much more noise (~56dB). On the other hand it's more expensive ($165) and bulkier (12.6" square), and arguably uglier.
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