Calculate acoustic impedance and reflection/transmission at interfaces.
Material Properties
Acoustic Properties
Enter parameters to calculate
About this calculator
Quick Reference
ZAcoustic Impedance (Rayls)
ρ (rho)Density (kg/m³)
cSpeed of Sound (m/s)
Rayl1 kg/m²·s
Overview
Acoustic impedance (Z) is a physical property of a medium that describes its resistance to the passage of sound waves. It is defined as the product of the material's density and the speed of sound within it.
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Pro Tips
Acoustic impedance is measured in Rayls (kg/m²·s).
Large differences in impedance at an interface cause significant reflection (e.g., air to bone).
Matching impedance is crucial in ultrasound imaging to ensure waves penetrate the body.
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Fun Facts
"The acoustic impedance of air is about 413 Rayls, while steel is about 46,000,000 Rayls!"
"Ultrasound gel is used to 'match' the impedance between the transducer and the skin, preventing air gaps that would reflect almost all the sound."
"Dolphins use their melon (a fatty organ) to match the acoustic impedance of their sound production to the surrounding seawater."
