A quiet bathroom fan is 0.3 to 1.0 sones. Quiet bathroom fans make as much noise as normal breathing or whispering from a few feet away. What is a sone? A sone is a measurement of sound, similar to decibels. They are linear in that 1 sone is twice as loud as .5 sones. And 2 ...
There is no "dBA" curve given as threshold of human hearing. "dBA" has absolutely noting to do with sone, or with phons, or sound pressure level in dB. 60 phons means "as loud as a pure 1000 Hz tone with a level of 60 dB."Relation between loudness N in sones and loudness level...
3 sones or more: Noticeably loud, which can be intrusive if the bathroom is used late at night or early in the morning. Why Fan Noise Matters Comfort & Convenience: A quieter fan is more likely to be used consistently, which helps reduce humidity and odor problems over time. ...
A 1-sone or 2-sone rating means the range hood is fairly quiet. For instance, 1 sone is equivalent to a working refrigerator, while 2 sones is the sound of your average office setting. Even a rating as high as 8 sones isn’t exactly what one would call “loud.” It equates to th...