Editing Weighting filter (section)

== Other applications of weighting ==
In the measurement of [[gamma rays]] or other [[ionising radiation]], a radiation monitor or [[dosimeter]] will commonly use a filter to attenuate those energy levels or wavelengths that cause the least damage to the human body, while letting through those that do the most damage, so that any source of radiation may be measured in terms of its true danger rather than just its 'strength'. The [[sievert]] is a unit of weighted radiation dose for [[ionising radiation]], which supersedes the older unit the [[Röntgen equivalent man|REM]] ([[roentgen (unit)|roentgen]] equivalent man).

Weighting is also applied to the measurement of sunlight when assessing the risk of skin damage through [[sunburn]], since different wavelengths have different biological effects. Common examples are the [[sun protection factor|SPF]] of sunscreen, and the [[UV index]].

Another use of weighting is in television, where the red, green and blue components of the signal are weighted according to their perceived brightness. This ensures compatibility with black and white receivers, and also benefits noise performance and allows separation into meaningful [[luminance (video)|luminance]] and [[chrominance]] signals for transmission.