Acoustics Calculators

Speed of sound, wavelength, loudness, reverberation, decibel sums and more acoustics tools.

Compute sound intensity I = W / (4πr²) from acoustic power and distance.

Compute Lw = 10·log₁₀(W / 1e-12) in dB from sound power.

Compute intensity I = I₀·10^(L/10) from a sound intensity level.

Compute pressure p = p₀·10^(SPL/20) from a sound pressure level.

Compute level drop ΔL = 20·log₁₀(r₁/r₂) between two distances.

Compute observed frequency f' = f·v/(v−v_s) for a source approaching.

Compute axial room mode f = c / (2L) from speed of sound and dimension.

Compute critical distance r_c = 0.141·√(Q·R) from directivity and room constant.

Compute total absorption A = S·α (sabins) from area and absorption coefficient.

Compute sound energy density w = I / c from intensity and speed of sound.

Compute particle velocity u = p / (ρ·c) from pressure, density and speed of sound.

Compute transmission loss TL = 10·log₁₀(1/τ) from transmission coefficient.