What is IPA? Meaning and history of the International Phonetic Alphabet
The pronunciation /kæt/ beside a dictionary entry is written in a system called the International Phonetic Alphabet, or IPA. It provides a shared notation for speech sounds across languages.
Why write sounds separately from spelling?
The letter a in cat does not have the same pronunciation as the a in cake. Writing /kæt/ and /keɪk/ makes that difference visible. These are broad transcriptions of common English pronunciations; individual speakers and accents can differ.
IPA is useful beyond English. A familiar spelling system can help you approximate an unfamiliar word, but may hide sound distinctions that your own language does not make. Phonetic notation gives you a way to record and compare those distinctions.
The alphabet and the Association
International Phonetic Alphabet names the notation. International Phonetic Association names the organisation that maintains it. Both are abbreviated IPA. Official changes to the alphabet and chart require approval by the Association's Council.
A short history
The system grew out of efforts to improve pronunciation teaching.
- 1886: Paul Passy and fellow teachers and linguists founded the Association in Paris.
- 1888: The first IPA chart appeared, two years after the Association's foundation.
- 1989: The Kiel Convention brought a major review and revision.
- 1999: The Association published its Handbook, explaining principles and applications.
- 2005 and 2015: The labiodental flap was added in 2005; wording and layout received small changes in 2015.
A chart's publication year need not be its revision year. Check the revision note rather than assuming that a new date means a new set of symbols. The official references below document the history and revisions.
What to notice when reading IPA
- Consonants and vowels: Symbols such as ʃ ŋ ə go beyond the letters on a standard keyboard. Consonants are grouped by place and manner of articulation; vowels by tongue position and lip rounding.
- Stress and length: ˈ marks primary stress, ˌ secondary stress, and ː a long sound. A stress mark comes before the syllable it applies to.
- Diacritics: Additional marks, such as ʰ for aspiration, describe a sound more precisely.
- Brackets: Slashes / / usually enclose phonemes, the units that distinguish words in a language. Square brackets [ ] enclose phonetic transcriptions of pronunciation. The amount of detail inside square brackets can vary.
Learn the sound of a symbol rather than its ordinary letter name: IPA j is not pronounced as the English letter name “jay”. Pair a chart with recordings and practice listening as well as reading.
How is it used?
IPA helps with dictionary pronunciation entries, language learning, linguistic analysis and the recording of speech. Transcriptions can differ with accent and editorial conventions. A shared notation does not make one accent the only correct way to speak.
Read and type IPA on Phonokey
Start with reading English IPA, or explore the kinds of IPA symbols. Use the English IPA keyboard for dictionary-style entries and the full IPA keyboard for a wider set of symbols and diacritics.
The English text-to-IPA tool looks up words in an American pronunciation dictionary. It does not resolve contextual homographs, connected speech or weak forms. Treat its output as a starting point and check a dictionary recording when pronunciation matters.