Acoustic Impedance Calculator — Formula
## Characteristic Acoustic Impedance
Acoustic impedance determines how much sound pressure results from a given particle velocity in a medium.
### Formula
**Z = rho * c**
- *rho* = medium density (kg/m3)
- *c* = speed of sound in the medium (m/s)
Air: about 415 Rayl. Water: about 1.48 million Rayl. Large impedance mismatches cause strong reflections at boundaries.
Acoustic impedance determines how much sound pressure results from a given particle velocity in a medium.
### Formula
**Z = rho * c**
- *rho* = medium density (kg/m3)
- *c* = speed of sound in the medium (m/s)
Air: about 415 Rayl. Water: about 1.48 million Rayl. Large impedance mismatches cause strong reflections at boundaries.
Exemplo Resolvido
Air at sea level (rho = 1.225 kg/m3, c = 343 m/s).
- Z = rho * c
- Z = 1.225 * 343
- Z = 420.2 Rayl