Threshold may refer to:

Architecture

* Threshold (door), the sill of a door

Media

* ''Threshold'' (1981 film) * ''Threshold'' (TV series), an American science fiction drama series produced during 2005-2006 * "Threshold" (''Stargate SG-1''), an episode of the TV series * "Threshold" (''Star Trek: Voyager''), an episode of the TV series * Threshold Entertainment, a Hollywood Intellectual Property Management and Production Company *

Threshold Podcast ''Threshold'' is a Peabody Award-winning podcast and radio show that tackles one pressing environmental story each season. The podcast explores the intersections of environment, history, culture, science, politics and social justice, focusing on t ...

, a podcast focused on long-form reporting of climate justice topics

Literature

* ''Threshold'' (1990 novel), a science fiction novel by Chris and Janet Morris * ''Threshold'' (Sara Douglass novel), a fantasy novel * ''Threshold'' (Palmer novel), a science fiction novel by David R. Palmer * ''Threshold'', the first volume of the collected short fiction of

Roger Zelazny Roger Joseph Zelazny (May 13, 1937 – June 14, 1995) was an American poet and writer of fantasy and science fiction short stories and novels, best known for '' The Chronicles of Amber''. He won the Nebula Award three times (out of 14 nom ...

* ''Threshold'' (DC Comics), a comic book published by DC Comics * Threshold (''Doctor Who''), an organization in ''Doctor Who'' comic strips * ''Threshold'', a science-fiction novel by Caitlín R. Kiernan * ''Threshold'', a Christian novel by Bill Myers * ''Threshold'', a science-fiction novel by Ben Mezrich * Threshold Editions, a conservative imprint

Music

Threshold (band) Threshold are an English progressive metal band formed in Surrey in the late 1980s. History 1988–1992 Threshold began their career in 1988, initially playing covers of metal groups like Ratt and Testament. As they continued playing tog ...

, a UK progressive metal band * Threshold House, a record label created by Coil * Threshold Records, a record label created by The Moody Blues

Albums

* ''Threshold'' (album), a 2006 album by HammerFall * ''Thresholds'' (album), a 1992 album by Nocturnus * ''Threshold'', a 1997 album by Erik Norlander

Songs

* "Threshold", by Pocahaunted, 2010 * "Threshold", by Slayer on the album '' God Hates Us All'', 2001 * "Threshold", by The Steve Miller Band from ''

Book of Dreams ''Book of Dreams'' is the tenth studio album by Steve Miller Band. The album was released in May 1977 on Capitol Records in the United States, Canada and Japan and by Mercury Records in Europe. Three singles were released from the album in 1977 w ...

'', 1977 * "Threshold", by Turnover from ''

Peripheral Vision Peripheral vision, or ''indirect vision'', is vision as it occurs outside the point of fixation, i.e. away from the center of gaze or, when viewed at large angles, in (or out of) the "corner of one's eye". The vast majority of the area in the ...

'', 2015 * "Threshold," from the '' Scott Pilgrim vs. the World soundtrack'', 2010 * "The Threshold", by Connie Smith from ''

Connie Smith Connie Smith (born Constance June Meador; August 14, 1941) is an American country music singer and songwriter. Her contralto vocals have been described by music writers as significant and influential to the women of country music. A similarity ...

'', 1965

Science

Biology

* Threshold (reference value) *

Absolute threshold In neuroscience and psychophysics, an absolute threshold was originally defined as the lowest level of a stimulus – light, sound, touch, etc. – that an organism could detect. Under the influence of signal detection theory, absolute threshol ...

Absolute threshold of hearing The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the organi ...

Action potential An action potential occurs when the membrane potential of a specific cell location rapidly rises and falls. This depolarization then causes adjacent locations to similarly depolarize. Action potentials occur in several types of animal cells, ...

Aerobic threshold Lactate inflection point (LIP), is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly. It is often expressed as 85% of maximum heart rate or 75% of maximum oxygen intake. When exercisi ...

Anaerobic threshold Lactate inflection point (LIP), is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly. It is often expressed as 85% of maximum heart rate or 75% of maximum oxygen intake. When exercisin ...

Dark adaptation threshold {{unreferenced, date=January 2015 Dark Adaptation Threshold (DAT) is a vision test that measures the adjustment of the eye occurring under low levels of illumination. When light enters the eye, it ultimately reaches the rods and cones, which are t ...

* Epidemic threshold *

Flicker fusion threshold The flicker fusion threshold, critical flicker frequency (CFF) or flicker fusion rate, is a concept in the psychophysics of vision. It is defined as the frequency at which an intermittent light stimulus appears to be completely steady to the aver ...

* Masking threshold * Odor detection threshold *

Renal threshold In physiology, the renal threshold is the concentration of a substance dissolved in the blood above which the kidneys begin to remove it into the urine. When the renal threshold of a substance is exceeded, reabsorption of the substance by the proxi ...

* Seizure threshold *

Sensory threshold In psychophysics, sensory threshold is the weakest stimulus that an organism can sense. Unless otherwise indicated, it is usually defined as the weakest stimulus that can be detected half the time, for example, as indicated by a point on a probabil ...

Threshold expression Mitochondrial threshold effect is a phenomenon where the number of mutated mtDNA has surpassed a certain threshold which causes the electron transport chain and ATP synthesis of a mitochondrion to fail. There isn't a set number that needs to be surp ...

* Threshold limit value *

Threshold model In mathematical or statistical modeling a threshold model is any model where a threshold value, or set of threshold values, is used to distinguish ranges of values where the behaviour predicted by the model varies in some important way. A particula ...

* Threshold of pain *

Threshold potential In electrophysiology, the threshold potential is the critical level to which a membrane potential must be depolarized to initiate an action potential. In neuroscience, threshold potentials are necessary to regulate and propagate signaling in both ...

Other science-related

* Ecological threshold * Error threshold (evolution) * Extinction threshold *

Lasing threshold The lasing threshold is the lowest excitation level at which a laser's output is dominated by stimulated emission rather than by spontaneous emission. Below the threshold, the laser's output power rises slowly with increasing excitation. Above thre ...

Percolation threshold The percolation threshold is a mathematical concept in percolation theory that describes the formation of long-range connectivity in random systems. Below the threshold a giant connected component does not exist; while above it, there exists a ...

* Polygyny threshold model * Threshold cryptosystem * Threshold displacement energy * Threshold energy * Threshold graph * Threshold knowledge *

* Threshold value *

Threshold voltage The threshold voltage, commonly abbreviated as Vth or VGS(th), of a field-effect transistor (FET) is the minimum gate-to-source voltage (VGS) that is needed to create a conducting path between the source and drain terminals. It is an important ...

Thresholding (image processing) In digital image processing, thresholding is the simplest method of segmenting images. From a grayscale image, thresholding can be used to create binary images. Definition The simplest thresholding methods replace each pixel in an image with a ...

* Transparency threshold

Other meanings

* ''Threshold'' (video game), a 1981 video game *

Threshold Audio Threshold Audio is a high-end audio equipment manufacturer originally established in California in 1974 by audio engineer Nelson Pass and graphic designer René Besne. The company, today based in Houston Texas, manufactures mono-block and stereo po ...

, a manufacturer of high end audio amplifiers * Displaced threshold, an aviation term *

Election threshold The electoral threshold, or election threshold, is the minimum share of the primary vote that a candidate or political party requires to achieve before they become entitled to representation or additional seats in a legislature. This limit can ...

, a concept in voting systems *

Poverty thresholds (United States Census Bureau) For statistical purposes (e.g., counting the poor population), the United States Census Bureau uses a set of annual income levels, the poverty thresholds, slightly different from the federal poverty guidelines. As with the poverty guidelines, th ...