2 sones
A is a unit of perceived loudness . It is a psychoacoustic metric—meaning it measures how loud a sound feels to the human brain, not how much physical energy the sound wave carries. sone to dba verified
Therefore, converting Sones to dBA directly is only truly “verified” for sounds with a total loudness level near . For louder sounds (3–10 Sones), the dBA reading will increasingly underestimate perceived loudness because the ear’s frequency response flattens at higher volumes. 2 sones A is a unit of perceived loudness
This makes it hard for a regular person to know if a 50 dB range hood is "twice as loud" as a 40 dB one without doing mental math. Proline Range Hoods The Hero: The Sone To make things easier, engineers created the linear unit of measurement. Proline Range Hoods Linear Simplicity For louder sounds (3–10 Sones), the dBA reading