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  3. Decibel Rating
Home glossary

Decibel Rating

How loud a device is, on a logarithmic scale where a 10 decibel increase represents roughly double the perceived loudness.

Quiet fans and air purifiers sit around 25 to 35 dB. Anything above 55 dB is too loud for a bedroom.

Used in

  • Best Humidifiers for Bedrooms
  • Best Air Purifiers
  • Best White Noise Machines

Related terms

  • Cushioning Rating
  • Dual Zone
  • CRI

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