Threshold may refer to:

Science

Biology

Threshold (reference value) In medicine and health-related fields, a reference range or reference interval is the range (statistics), range or the interval (mathematics), interval of values that is deemed normal for a physiology, physiological measurement in healthy persons ...

* Absolute threshold * Absolute threshold of hearing *

Action potential An action potential (also known as a nerve impulse or "spike" when in a neuron) is a series of quick changes in voltage across a cell membrane. An action potential occurs when the membrane potential of a specific Cell (biology), cell rapidly ri ...

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 exercisin ...

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 * Epidemic threshold *

Flicker fusion threshold The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science, more specificall ...

* Masking threshold * Odor detection threshold * Renal threshold * Seizure threshold * Sensory threshold * Threshold expression * Threshold limit value * Threshold model * 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 *

Percolation threshold The percolation threshold is a mathematical concept in percolation theory that describes the formation of long-range connectivity in Randomness, random systems. Below the threshold a giant connected component (graph theory), connected componen ...

* Polygyny threshold model *

Threshold cryptosystem A threshold cryptosystem, the basis for the field of threshold cryptography, is a cryptosystem that protects information by encrypting it and distributing it among a cluster of fault-tolerant computers. The message is encrypted using a public key, ...

* Threshold displacement energy * Threshold energy * Threshold graph * Threshold knowledge * Threshold model *

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 s ...

* Thresholding (image processing) *

Transparency threshold In data compression and psychoacoustics, transparency is the result of lossy data compression accurate enough that the compressed result is perceptually indistinguishable from the uncompressed input, i.e. perceptually lossless. A transparency ...

Architecture

* Threshold (architecture), the sill of a door

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

Media

* ''Threshold'' (1981 film) * ''Threshold'', a 2008 film directed by Deepak Rauniyar * ''Threshold'' (TV series), an American science fiction drama TV series * "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, a podcast focused on long-form reporting of climate justice topics

Music

Threshold (band) Threshold are an English progressive metal band formed in Surrey in the late 1980s. The guitarist and producer Karl Groom has been the band's only consistent member. History 1988–1992 Threshold began their career in 1988, initially play ...

, 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 Sex Bob-Omb from the ''Scott Pilgrim vs. the World'' soundtrack, 2010 * "Threshold", by Slayer from ''

God Hates Us All ''God Hates Us All'' is the ninth studio album by American thrash metal band Slayer, released on September 11, 2001, by American Recordings (US), American Recordings. It was recorded over three months at The Warehouse Studio in Vancouver, and inc ...

'', 2001 * "Threshold", by the Steve Miller Band from '' Book of Dreams'', 1977 * "Threshold", by Turnover from '' Peripheral Vision'', 2015 * "The Threshold", by Connie Smith from '' Connie Smith'', 1965

Other uses

* ''Threshold'' (video game), a 1981 video game * Thresholds, a nonprofit organization serving persons with mental illnesses and substance abuse problems in Illinois * Threshold Audio, a manufacturer of high end audio amplifiers *

Displaced threshold A displaced threshold or DTHR is a runway threshold located at a point other than the physical beginning or end of the runway. The portion of the runway behind a displaced threshold may be used for takeoff in either direction and landings from t ...

, an aviation term * Election threshold, a concept in voting systems * Poverty thresholds (United States Census Bureau) *In

government procurement Government procurement or public procurement is the purchase of goods, works (construction) or services by the state, such as by a government agency or a state-owned enterprise. In 2019, public procurement accounted for approximately 12% of GDP ...

, the expenditure value which determines which rules and procedures are to be applied to a proposed purchase