Power, root-power, and field quantities
A power quantity is a power or a quantity directly proportional to power, e.g., energy density, acoustic intensity, and luminous intensity.[1]
A field quantity is a quantity such as voltage, current, sound pressure, electric field strength, speed, or charge density, the square of which, in linear systems, is proportional to power.[2] The term root-power quantity was introduced in the ISO 80000-1#Annex C, defined as the square root of a power quantity; it replaces and deprecates the term field quantity.
See also
- Fresnel reflection field and power equations
- Sound level, defined in different ways for the pressure or power of sound
References
- ^ Ainslie, M. A. A Century of Sonar: Planetary Oceanography, Underwater Noise Monitoring, and the Terminology of Underwater Sound. Acoustics Today (2015)
- ^ Brian C.J. Moore (1995). Hearing. Academic Press. p. 11. ISBN 9780080533865.