Decibel A, B, and C Weighting
Sound pressure filters compensate for the sensitivity of the human ear, which is most sensitive to sounds in the 1 to 4 kHz range. Enter your raw measurements below to apply the standard A, B, and C weighting curves.
A, B, C Decibel Weighting
| Frequency (Hz) | Measured dB | Weighted dB(A) | Weighted dB(B) | Weighted dB(C) |
|---|---|---|---|---|
| 31.25 | - | - | - | |
| 62.5 | - | - | - | |
| 125 | - | - | - | |
| 250 | - | - | - | |
| 500 | - | - | - | |
| 1000 | - | - | - | |
| 2000 | - | - | - | |
| 4000 | - | - | - | |
| 8000 | - | - | - | |
| Total (Logarithmic Sum): | - dB(A) | - dB(B) | - dB(C) | |
Note: Totals are calculated using exact logarithmic addition 10 × log₁₀( Σ 10^(Lᵢ / 10) ) rather than the manual estimation method.