Ad
related to: decibel root power quantity
Search results
Results From The WOW.Com Content Network
A root-power 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. [3] The term root-power quantity refers to the square root that relates these quantities to power. The term was introduced in ISO 80000-1 § Annex C ...
The neper is the change in the level of a root-power quantity when the root-power quantity changes by a factor of e, that is 1 Np = ln(e) = 1, thereby relating all of the units as nondimensional natural log of root-power-quantity ratios, 1 dB = 0.115 13... Np = 0.115 13.... Finally, the level of a quantity is the logarithm of the ratio of the ...
A power level is a logarithmic quantity used to measure power, power density or sometimes energy, with commonly used unit decibel (dB). A field level (or root-power level) is a logarithmic quantity used to measure quantities of which the square is typically proportional to power (for instance, the square of voltage is proportional to power by ...
Underlying quantity Interpretation bit: 2: number of possible messages quantity of information: byte: 2 8 = 256: number of possible messages quantity of information: decibel: 10 (1/10) ≈ 1.259: any power quantity (sound power, for example) sound power level (for example) decibel: 10 (1/20) ≈ 1.122: any root-power quantity (sound pressure ...
The neper is defined in terms of ratios of field quantities — also called root-power quantities — (for example, voltage or current amplitudes in electrical circuits, or pressure in acoustics), whereas the decibel was originally defined in terms of power ratios. A power ratio 10 log r dB is equivalent to a field-quantity ratio 20 log r dB ...
dBm or dB mW (decibel-milliwatts) is a unit of power level expressed using a logarithmic decibel (dB) scale respective to one milliwatt (mW). It is commonly used by radio, microwave and fiber-optical communication technicians & engineers to measure the power of system transmissions on a log scale , which can express both very large and very ...
While 1 atm (194 dB peak or 191 dB SPL) [11] [12] is the largest pressure variation an undistorted sound wave can have in Earth's atmosphere (i. e., if the thermodynamic properties of the air are disregarded; in reality, the sound waves become progressively non-linear starting over 150 dB), larger sound waves can be present in other atmospheres ...
Effect of moisturizer and lubricant on the finger‒surface sliding contact: tribological and dynamical analysis has level only in a footnote, I think: "The level of a root-power quantity LF is a logarithmic root-power quantity defined as LF = ln(F/F0) where F and F0 represent two root-power quantities of the same kind, F0 being a reference ...