How the acoustic wavelength calculator works
Speed of sound in air is estimated from temperature (°C, °F, or K), then wavelength λ = c / f and quarter wavelength λ/4 are computed. Results can be shown in metres, millimetres, centimetres, inches, or feet.
Key terms
- Wavelength (λ) - distance of one full cycle at a given frequency.
- Quarter wavelength (λ/4) - common reference for absorber depth and port length limits.
- Speed of sound - approximately 331.3 + 0.606 × T (°C) m/s in dry air.
Frequently asked questions
- Why use quarter wavelength? Many porous absorbers and quarter-wave traps are tuned near λ/4 at the target frequency.
- Can I enter frequency in kHz? Yes — select kHz for bass and mid calculations (e.g. 2 kHz = 2000 Hz).