Roughness may refer to: *

Surface roughness Surface roughness or simply roughness is the quality of a surface of not being smooth and it is hence linked to human ( haptic) perception of the surface texture. From a mathematical perspective it is related to the spatial variability structure ...

, the roughness of a surface *

Roughness length Roughness length (z_0) is a parameter used in modeling the horizontal mean wind speed near the ground. In wind vertical profile such the log wind profile, the roughness length (with dimension of length and SI unit of metres) is equivalent to the ...

, roughness as applied in meteorology * International Roughness Index, the roughness of a road *

Hydraulic roughness Hydraulic roughness is the measure of the amount of frictional resistance water experiences when passing over land and channel features. It quantifies the impact of surface irregularities and obstructions on the flow of water. One roughness coeff ...

, the roughness of land and waterway features *

Roughness (psychophysics) Roughness is studied by examining how textures are perceived and encoded by an individual's somatosensory system. In an experiment to measure and compare the roughness of different sounds, listeners are presented with different sounds and asked to ...

in psychoacoustics refers to the level of dissonance *The 'roughness' of a line or surface, measured numerically by the

Hausdorff dimension In mathematics, Hausdorff dimension is a measure of ''roughness'', or more specifically, fractal dimension, that was introduced in 1918 by mathematician Felix Hausdorff. For instance, the Hausdorff dimension of a single point is zero, of a line ...

* Roughness/resel, the resel/roughness of an image/volume *

Unnecessary roughness In gridiron football, a penalty is a sanction assessed against a team for a violation of the rules, called a foul. Officials initially signal penalties by tossing a bright yellow colored penalty flag onto the field toward or at the spot of a fo ...

, a type of foul in gridiron football

See also