# characteristic acoustic impedance

> quotient of sound pressure and the component of the sound particle velocity in the direction of wave propagation

**Wikidata**: [Q87051330](https://www.wikidata.org/wiki/Q87051330)  
**Source**: https://4ort.xyz/entity/characteristic-acoustic-impedance


## References

1. ISO 80000-8:2020 Quantities and units — Part 8: Acoustics
2. ISO 80000-8:2007 Quantities and units—Part 8: Acoustics