// multi-utility computation suite · offline · instant · precise
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sci.acoustic-impedance-reflection Calculator
Calculates the pressure reflection coefficient r = (Z₂−Z₁)/(Z₂+Z₁) and intensity reflection R = r² and transmission T = 1−R for oblique incidence. For perpendicular sound at a concrete wall (Z₂ ≫ Z₁), R ≈ 1 — almost all sound reflects, making concrete an excellent barrier.
Inputs
Z1 Pa S M
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Z2 Pa S M
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Frequency Hz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
Results
reflection coefficient R (pressure)
Sample size or count used in the calculation.
transmission coefficient T (pressure)
Sample size or count used in the calculation.
intensity reflection
Sample size or count used in the calculation.
reflection loss (dB)
The decrease or degradation from the baseline.
R = (Z₂-Z₁)/(Z₂+Z₁)
Reference formula or conversion factor shown for context.