Free Acoustic Tools — Room Calculators & Audio Utilities

Room Analysis

Standing waves and resonant frequencies for your room dimensions

Bolt Area chart and room proportion rating

Find the modal-to-diffuse transition frequency

Sabine and Eyring reverberation time by octave band

Starting positions and SBIR warnings for your room

Boundary interference cancellation frequencies

Convert between Hz, wavelength, and musical note

Add dB levels, distance attenuation, SPL from power

Test tones and sweeps to hear your room modes

Model any room shape with finite element analysis, measure your room with a mic, and auto-optimize speaker placement. All in your browser.