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sci.sound-transmission-loss Calculator
Calculates sound transmission loss through a partition from mass law: TL = 20 log₁₀(mf) − 47 dB, where m is surface mass in kg/m² and f is frequency. A 100 mm concrete wall (mass ≈ 240 kg/m²) provides TL ≈ 50 dB at 500 Hz.
Inputs
Thickness Mm
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
Density Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Frequency Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Young Modulus Gpa
Reference formula or conversion factor shown for context.