Octane definition, any of 18 isomeric saturated hydrocarbons having the formula C8H18, some of which are obtained in the distillation and cracking of petroleum. In. Thus the international standard pitch A above middle C vibrates at 440 hertz (cycles per second); the octave above this A vibrates at 880 hertz, while the octave below it vibrates Other interval qualities are also possible, though rare. See the full definition for octane in the English Language Learners Dictionary, Britannica.com: Encyclopedia article about octane. Among the most common are the scientific, Helmholtz, organ pipe, MIDI[citation needed], and MIDI note systems.

octane synonyms, octane pronunciation, octane translation, English dictionary definition of octane. Will octane 87 replace octane 80 in Egyptian petrol stations in November? In scientific pitch notation, a specific octave is indicated by a numerical subscript number after note name. Accessed 5 Nov. 2020. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'octane.'

Octave, in music, an interval whose higher note has a sound-wave frequency of vibration twice that of its lower note.

Learn more about octaves, note-frequencies, and learn multilingual … 8a or 8va stands for ottava, the Italian word for octave (or "eighth"); the octave above may be specified as ottava alta or ottava sopra). Notes separated by an octave "ring" together, adding a pleasing sound to music. The word is also used to describe melodies played in parallel in more than multiple octaves. Octave equivalence is a part of most advanced musical cultures, but is far from universal in "primitive" and early music. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! [11] Studies have also shown the perception of octave equivalence in rats (Blackwell & Schlosberg 1943), human infants (Demany & Armand 1984),[12] and musicians (Allen 1967) but not starlings (Cynx 1993), 4–9 year old children (Sergeant 1983), or nonmusicians (Allen 1967). J Acoust Soc Am 1984; 76:57–66. Please tell us where you read or heard it (including the quote, if possible). Western music consists of 12 identifiable pitches, and those pitches repeat in the same order throughout the complete span of human hearing. The octave above or below an indicated note is sometimes abbreviated 8a or 8va (Italian: all'ottava), 8va bassa (Italian: all'ottava bassa, sometimes also 8vb), or simply 8 for the octave in the direction indicated by placing this mark above or below the staff. [6], An 88-key piano, with the octaves numbered and, An example of the same three notes expressed in three ways: (1) regularly, (2) in an, Demonstration of octave equivalence.

[10], Monkeys experience octave equivalence, and its biological basis apparently is an octave mapping of neurons in the auditory thalamus of the mammalian brain. [4][verification needed], After the unison, the octave is the simplest interval in music. Further octaves of a note occur at '"`UNIQ--postMath-00000001-QINU`"' times the frequency of that note (where n is an integer), such as 2, 4, 8, 16, etc. For this reason, notes an octave apart are given the same note name in the Western system of music notation—the name of a note an octave above A is also A. “Octane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octane. e.g., Nettl, 1956; Sachs, C. and Kunst, J.

2. [9] Leon Crickmore recently proposed that "The octave may not have been thought of as a unit in its own right, but rather by analogy like the first day of a new seven-day week". 'Nip it in the butt' or 'Nip it in the bud'? Octaves are identified with various naming systems. Sometimes 8va is used to tell the musician to play a passage an octave lower (when placed under rather than over the staff), though the similar notation 8vb (ottava bassa or ottava sotto) is also used. In this notation, middle C is C4, because of the note's position as the fourth C key on a standard 88-key piano keyboard, while the C an octave higher is C5. Check below to see how we return to the original note in 6 tones: Just for the sake of curiosity, pianos usually have about 7 octaves. (Elements & Compounds) a liquid alkane hydrocarbon found in petroleum and existing in 18 isomeric forms, esp the isomer, any of 18 isomeric saturated hydrocarbons having the formula C, Any of several hydrocarbon compounds having the formula C, The privately-run FPCC said prices at its gas stations will be NT$26.6 per liter for 92, Moreover, the possible hike in transpiration costs could also impact the prices of goods and products, since some freight transport vehicles also use, KBR, in alliance with RRT Global, has been offering MAX-ISOM catalytic distillation technology for the isomerization of C5 and C6 n-paraffins to boost gasoline pool, 12 August 2019 - US-based professional services and technologies provider KBR (NYSE: KBR) has acquired isomerisation technologies from RRT Global that will enable KBR to offer expanded, The specification also talks about the chemical and physical requirements of petrol such as the limits of, Fiat Chrysler Automobiles, a company formed by the reorganisation of Fiat and Chrysler, has launched blacked-out appearance package and added the Dodge Charger SRT Hellcat, Speaking about the introduction of Altron X Hi-, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content. How to use octane in a sentence. An octave is a large musical interval that separates two of the same notes. In Western music notation, notes separated by an octave (or multiple octaves) have the same letter name and are of the same pitch class. There are 12 semitones in the chromatic scale, while the diatonic scale has 7 unique notes (but spans 8). The interval is so natural to humans that when men and women are asked to sing in unison, they typically sing in octave.[5]. Can you spell these 10 commonly misspelled words? Send us feedback. How to use a word that (literally) drives some pe... Do you know what languages these words come from? Delivered to your inbox! ", The abbreviations col 8, coll' 8, and c. 8va stand for coll'ottava, meaning "play the notes in the passage together with the notes in the notated octaves". The ratio of frequencies of two notes an octave apart is therefore 2:1. Define octane. Burns, Edward M. (1999). Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Learn a new word every day. [7][failed verification][8][clarification needed] The languages in which the oldest extant written documents on tuning are written, Sumerian and Akkadian, have no known word for "octave". and the reciprocal of that series. [3] The interval between the first and second harmonics of the harmonic series is an octave. (1962).

Octane definition is - any of several isomeric liquid alkanes C8H18. [6] Thus all C♯s, or all 1s (if C = 0), in any octave are part of the same pitch class. While octaves commonly refer to the perfect octave (P8), the interval of an octave in music theory encompasses chromatic alterations within the pitch class, meaning that G♮ to G♯ (13 semitones higher) is an Augmented octave (A8), and G♮ to G♭ (11 semitones higher) is a diminished octave (d8). The use of such intervals is rare, as there is frequently a preferable enharmonically-equivalent notation available (minor ninth and major seventh respectively), but these categories of octaves must be acknowledged in any full understanding of the role and meaning of octaves more generally in music. This is called octave equivalence, the assumption that pitches one or more octaves apart are musically equivalent in many ways, leading to the convention "that scales are uniquely defined by specifying the intervals within an octave". The New Grove Dictionary of Music and Musicians, "Flutes of Gilgamesh and Ancient Mesopotamia", The mechanism of octave circularity in the auditory brain, https://en.wikipedia.org/w/index.php?title=Octave&oldid=986623564, Wikipedia articles incorporating the Cite Grove template, Wikipedia articles incorporating the Cite Grove template without a link parameter, Short description is different from Wikidata, Articles containing Italian-language text, Articles with unsourced statements from July 2020, Wikipedia articles needing factual verification from January 2015, Articles with failed verification from June 2020, Wikipedia articles needing clarification from June 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 November 2020, at 00:40.

The human ear tends to hear both notes as being essentially "the same", due to closely related harmonics. Test Your Knowledge - and learn some interesting things along the way. If we select a note—say, Bb for instance—we say that the next Bb is “an octave away.” This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.

For example, if one note has a frequency of 440 Hz, the note one octave above is at 880 Hz, and the note one octave below is at 220 Hz.

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