Convert any sound frequency to its wavelength in air and back, including the quarter-wavelength that determines how thick acoustic treatment needs to be.
Frequency ↔ Wavelength Calculator
Wavelength = speed of sound (343 m/s) ÷ frequency. The quarter-wavelength matters for acoustics: porous bass treatment only absorbs efficiently down to frequencies whose quarter-wavelength is similar to the panel’s depth, which is why low bass needs thick traps.
How it works
Wavelength equals the speed of sound (343 m/s in air) divided by frequency. Low frequencies have long wavelengths, which is why bass is so hard to control in small rooms and why effective bass traps have to be deep — porous absorbers work best when their depth approaches a quarter of the wavelength.
FAQ
Why does wavelength matter for treatment?
Porous absorbers lose effectiveness for frequencies whose quarter-wavelength is much larger than the panel depth, so thin panels barely touch deep bass.
Does temperature change this?
Slightly — the speed of sound rises a little with temperature, but 343 m/s (about 20 °C) is the standard value used here.