Compute the sound pressure level from pressure relative to the reference p₀: SPL = 20·log₁₀(p / p₀).
输入声压(有效值),求声压级 SPL。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Sound pressure level | Lp = 20·log10(p / p0), reference p0 = 20 µPa (threshold of hearing at 1 kHz) | ISO 80000-8 / IEC 61672 |