Critical Band Calculator - Free Online Tool

The critical band concept is fundamental in psychoacoustics, describing the range of frequencies within which the human ear perceives sound energy as being most correlated. Our Critical Band Calculator simplifies this complex acoustic measurement for you.

Simply input the center frequency (in Hz) and the desired bandwidth or octave span into the designated fields. The tool then applies established psychoacoustic models—which relate frequency to perceived auditory resolution—to compute the precise critical bandwidth in Hertz (Hz).

For instance, if you input a center frequency of 1000 Hz, the calculator will output its corresponding critical band width. This calculation is crucial because simply using an equal bandwidth filter (like a standard EQ setting) often misrepresents how sound energy is actually perceived by listeners.

When analyzing a sound, always consider the relationship between different frequency bands. The critical band calculator is best used as part of an overall listening process, not as a standalone answer.

• Reference Tracks: Compare your mix's spectral profile against professional reference tracks. Identify where your perceived energy is lacking or excessive.
• Focus on Transients: For sounds with sharp attacks (like snare drums), remember that the initial transients often occupy a wider, more variable critical band than sustained tones do.

When making adjustments, try to solve problems by widening or narrowing your focus based on these bands. For example, if a mix sounds muddy, calculate the critical band at 250 Hz and apply subtle cuts there rather than broad, drastic filtering.