Interactive · computes on your input
dB(A) versus spectrum — where the low-frequency hum goes
Octave-band spectrum showing physical (unweighted) level and the A-weighted contribution of each band
physical level (unweighted, Z)
after A-weighting
A-weighting curve
—
Unweighted · dB
—
A-weighted · dB(A)
—
Gap discarded
Example spectra