Frequency, wavelength, and period
Frequency counts cycles each second. Period is the time for one cycle, and wavelength is the distance that cycle travels through a medium. Higher frequencies therefore have shorter periods and wavelengths when wave speed stays constant.
Why wavelength matters in rooms
Low-frequency wavelengths can be comparable with room dimensions, creating strong peaks and nulls. Speaker placement, listener position, boundaries, and acoustic treatment all affect the result; wavelength is a planning clue, not a prediction of one room response.
Using the speed control
The default 343 m/s is a useful approximation for dry air near 20°C. Temperature and the medium change propagation speed. Sound travels differently in water and solids, so enter a suitable value for those calculations.
Practical applications
Use wavelength and quarter-wavelength values when thinking about spacing, phase, crossover regions, and treatment depth. Real loudspeakers and rooms are three-dimensional systems, so measurements remain essential.
How the calculation works
Wavelength equals wave speed ÷ frequency; period equals 1 ÷ frequency.
