If you want to know how loud something seems to a person, use sones. If you want to know the physical sound pressure (for engineering or hearing safety), use dB.
If you’ve ever shopped for a range hood, a bathroom exhaust fan, or a leaf blower, you’ve likely seen two different units for noise: sones and decibels (dB) . At first glance, both seem to measure "how loud" something is. But they are not the same, and you cannot simply convert between them with a single formula. sones to db
A sound judged to be twice as loud is 2 sones. A sound half as loud is 0.5 sones. This makes sones intuitive for product design and consumer comparisons. If you want to know how loud something
And if you need to convert one to the other — remember it’s an at best. Your ears are the ultimate judge. Want a quick reference? For most common household fans and vents: 1 sone ≈ 40 dB, 2 sones ≈ 50 dB, 4 sones ≈ 60 dB, but expect variation of ±5 dB depending on pitch. At first glance, both seem to measure "how
| Sones | Approx. dB SPL (at 1 kHz) | Perceived Loudness | |-------|----------------------------|--------------------| | 0.5 | ~35 dB | Very quiet | | 1.0 | 40 dB | Reference | | 2.0 | ~50 dB | Twice as loud as 1 sone | | 4.0 | ~60 dB | Twice as loud as 2 sones | | 8.0 | ~70 dB | Twice as loud as 4 sones | | 16.0 | ~80 dB | Very loud (vacuum cleaner) |