Phonemes in the context of Data system

Language change is the process of alteration in the features of a single language, or of languages in general, over time. It is studied in several subfields of linguistics: historical linguistics, sociolinguistics, and evolutionary linguistics. Traditional theories of historical linguistics identify three main types of change: systematic change in the pronunciation of phonemes, or sound change; borrowing, in which new features (often, new words) enter a language or dialect as a result of influence from another language or dialect; and analogical change, in which the shape or grammatical behavior of a word is altered to more closely resemble that of another word. Research on language change generally assumes the uniformitarian principle—the presumption that language changes in the past took place according to the same general principles as language changes visible in the present.

Language change usually does not occur suddenly, but rather takes place via an extended period of variation, during which new and old linguistic features coexist. All living languages are continually undergoing change. Some commentators use derogatory labels such as "corruption" to suggest that language change constitutes a degradation in the quality of a language, especially when the change originates from human error or is a prescriptively discouraged usage. Modern linguistics rejects this concept, since from a scientific point of view such innovations cannot be judged in terms of good or bad. John Lyons notes that "any standard of evaluation applied to language-change must be based upon a recognition of the various functions a language 'is called upon' to fulfil in the society which uses it".

A mantra (/ˈmæntrə, ˈmʌn-/ MAN-trə, MUN-; Pali: mantra) or mantram (Devanagari: मन्त्रम्) is a sacred utterance, a numinous sound, a syllable, word or phonemes, or group of words (most often in an Indo-Iranian language like Sanskrit or Avestan) believed by practitioners to have religious, magical or spiritual powers. Some mantras have a syntactic structure and a literal meaning, while others do not.

ꣽ, ॐ (Aum, Om) serves as an important mantra in various Indian religions. Specifically, it is an example of a seed syllable mantra (bijamantra). It is believed to be the first sound in Hinduism and as the sonic essence of the absolute divine reality. Longer mantras are phrases with several syllables, names and words. These phrases may have spiritual interpretations such as a name of a deity, a longing for truth, reality, light, immortality, peace, love, knowledge, and action. Examples of longer mantras include the Gayatri Mantra, the Hare Krishna mantra, Om Namah Shivaya, the Mani mantra, the Mantra of Light, the Namokar Mantra, and the Mūl Mantar. Mantras without any actual linguistic meaning are still considered to be musically uplifting and spiritually meaningful.

Alphabetic writing – where letters generally correspond to individual sounds in a language (phonemes), as opposed to having symbols for syllables or words – was likely invented once in human history. The Proto-Sinaitic script emerged during the 2nd millennium BC among a community of West Semitic laborers in the Sinai Peninsula. Exposed to the idea of writing through the complex system of Egyptian hieroglyphs, their script instead wrote their native Canaanite language. With the possible exception of hangul in Korea, all later alphabets used throughout the world either descend directly from the Proto-Sinaitic script, or were directly inspired by it. It has been conjectured that the community selected a small number of those commonly seen in their surroundings to describe the sounds, as opposed to the semantic values of their own languages. This script was partly influenced by hieratic, an older cursive script derived from hieroglyphs. Mainly through the Phoenician alphabet that descended from Proto-Semitic, alphabetic writing spread throughout West and South Asia, North Africa, and Europe during the 1st millennium BC.

Some modern authors distinguish between consonantal alphabets, with the term abjad coined for them in 1996, and true alphabets with letters for both consonants and vowels. In this narrower sense, the first true alphabet would be the Greek alphabet, which was adapted from the Phoenician alphabet. Many linguists are skeptical of the value of wholly separating the two categories. Latin, the most widely used alphabet today, in turn derives from the Etruscan and Greek alphabets, themselves derived from Phoenician.

Phonemic awareness is a part of phonological awareness in which listeners are able to hear, identify and manipulate phonemes, the smallest mental units of sound that help to differentiate units of meaning (morphemes). Separating the spoken word "cat" into three distinct phonemes, /k/, /æ/, and /t/, requires phonemic awareness. The National Reading Panel has found that phonemic awareness improves children's word reading and reading comprehension and helps children learn to spell. Phonemic awareness is the basis for learning phonics.

Phonemic awareness and phonological awareness are often confused since they are interdependent. Phonemic awareness is the ability to hear and manipulate individual phonemes. Phonological awareness includes this ability, but it also includes the ability to hear and manipulate larger units of sound, such as onsets and rimes and syllables.

In formal language theory, an alphabet, often called a vocabulary in the context of terminal and nonterminal symbols, is a non-empty set of indivisible symbols/characters/glyphs, typically thought of as representing letters, characters, digits, phonemes, or even words. The definition is used in a diverse range of fields including logic, mathematics, computer science, and linguistics. An alphabet may have any cardinality ("size") and, depending on its purpose, may be finite (e.g., the alphabet of letters "a" through "z"), countable (e.g., ${\displaystyle \{v_{1},v_{2},\ldots \}}$), or even uncountable (e.g., ${\displaystyle \{v_{x}:x\in \mathbb {R} \}}$).

Strings, also known as "words" or "sentences", over an alphabet are defined as a sequence of the symbols from the alphabet set. For example, the alphabet of lowercase letters "a" through "z" can be used to form English words like "iceberg" while the alphabet of both upper and lower case letters can also be used to form proper names like "Wikipedia". A common alphabet is {0,1}, the binary alphabet, and "00101111" is an example of a binary string. Infinite sequences of symbols may be considered as well (see Omega language).

Stuttering, also known as stammering, is a speech disorder characterized externally by involuntary repetitions and prolongations of sounds, syllables, words, or phrases as well as involuntary silent pauses called blocks in which the person who stutters is unable to produce sounds. Almost 80 million people worldwide stutter, about 1% of the world's population, with a prevalence among males at least twice that of females. Persistent stuttering into adulthood often leads to outcomes detrimental to overall mental health, such as social isolation and suicidal thoughts.

Stuttering is not connected to the physical ability to produce phonemes (i.e. it is unrelated to the structure or function of the vocal cords). It is also unconnected to the structuring of thoughts into coherent sentences inside sufferers' brains, meaning that people with a stutter know precisely what they are trying to say (in contrast with alternative disorders like aphasia). Stuttering is purely a neurological disconnect between intent and outcome during the task of expressing each individual sound. While there are rarer neurogenic (e.g. acquired during physical insult) and psychogenic (e.g. acquired after adult-onset mental illness or trauma) variants, the typical etiology, development, and presentation is that of idiopathic stuttering in childhood that then becomes persistent into adulthood.

Polish orthography is the system of writing the Polish language. The language is written using the Polish alphabet, which derives from the Latin alphabet, but includes some additional letters with diacritics. The orthography is mostly phonetic, or rather phonemic—the written letters (or combinations of them) correspond in a consistent manner to the sounds, or rather the phonemes, of spoken Polish. For detailed information about the system of phonemes, see Polish phonology.

The cot–caught merger, also known as the LOT–THOUGHT merger or low back merger, is a phonological phenomenon present in some dialects of English where speakers do not distinguish the vowel phonemes in words like cot versus caught. Cot and caught, along with bot and bought, pond and pawned, etc., are examples of minimal pairs that are lost as a result of this sound change; i.e. each of these pairs of words is pronounced the same. The phonemes involved in the cot–caught merger, the low back vowels, are typically represented in the International Phonetic Alphabet as /ɒ/ and /ɔ/ or, for United States English, as /ɑ/ and /ɔ/. The merger is typical of most Indian, Canadian, and Scottish English dialects as well as some Irish and U.S. English dialects.

An additional vowel merger, the father–bother merger, which spread through North America in the eighteenth and nineteenth centuries, has resulted today in a three-way merger in which most Canadian and many U.S. accents have no vowel difference in words like PALM /ɑ/, LOT /ɒ/, and THOUGHT /ɔ/.

In English, many vowel shifts affect only vowels followed by /r/ in rhotic dialects, or vowels that were historically followed by /r/ that has been elided in non-rhotic dialects. Most of them involve the merging of vowel distinctions, so fewer vowel phonemes occur before /r/ than in other positions of a word.

In phonetics and historical linguistics, fusion, or coalescence, is a sound change in which two or more segments with distinctive features merge into a single segment. This can occur both on consonants and in vowels. A word like educate is one that may exhibit fusion: /ˈɛdjʊkeɪt/ or /ˈɛdʒʊkeɪt/. A merger between two segments can also occur between word boundaries, an example being the phrase got ya /ˈɡɒt jə/ being pronounced like gotcha /ˈɡɒtʃə/. Most cases of fusion lead to allophonic variation, but some sequences of segments may lead to wholly-distinct phonemes.

A common form of fusion is found in the development of nasal vowels, which frequently become phonemic when final nasal consonants are lost from a language, as has occurred in French and Portuguese. Compare the French words un vin blanc [œ̃ vɛ̃ blɑ̃] "a white wine" with their English cognates, one, wine, blank, which retain the n sounds.