Calcolatrice Decibel — Formula
## Decibel Scale
The decibel scale expresses sound intensity on a logarithmic scale relative to a reference intensity.
### Formula
**dB = 10 * log10(I / I_0)**
where I_0 = 10^-12 W/m². Every 10 dB increase represents a tenfold increase in intensity. A 3 dB increase doubles the intensity.
The decibel scale expresses sound intensity on a logarithmic scale relative to a reference intensity.
### Formula
**dB = 10 * log10(I / I_0)**
where I_0 = 10^-12 W/m². Every 10 dB increase represents a tenfold increase in intensity. A 3 dB increase doubles the intensity.
Esempio Risolto
A sound with intensity 0.001 W/m².
- dB = 10 * log10(I / I_0)
- dB = 10 * log10(0.001 / 1e-12)
- dB = 10 * log10(1e9)
- dB = 10 * 9 = 90 dB