KNOW IPA / SMORTLER + SI

See the sounds behind the words.

Letters tell you how words are written. IPA symbols help you understand how they are spoken. Explore the International Phonetic Alphabet and why accurate pronunciation matters.

Clearer wordsFewer mistakesMore confidence
Violet, the robotic SMORTLER SI assistant, thoughtfully exploring speech sounds and language.
Hi, I'm Violet.Let's make communication clearer.
C
One written letter.The spelling on the page.
/k/
One speech sound.The pronunciation you hear.
✓
A shared notation.Symbols let us compare sounds.

START WITH THE IDEA

What is the International Phonetic Alphabet?

IPA is a system of symbols for representing the sounds of spoken language. It helps learners, teachers, linguists and many speech professionals describe pronunciation precisely.

01 / BASICS

WRITING

cat

Ordinary spelling

English spelling can be inconsistent. The same letters can represent different sounds, and a single sound can have multiple spellings.

SOUND

/kæt/

IPA transcription

Three symbols describe three sounds: /k/, /æ/ and /t/. The slashes tell you this is a broad sound transcription, not normal spelling.

i

Useful distinction: IPA is not the Alfa/Bravo/Charlie spelling alphabet. That system spells letters across a voice connection; IPA describes the sounds in spoken language. See the NATO/ICAO spelling alphabet.

A BEGINNER'S REFERENCE

Learn the sounds behind common words.

These examples use common General American English pronunciations. Accents differ, and IPA can describe many more sounds than those below.

02 / SYMBOLS

Vowel sounds

Tap a symbol to copy it

Consonant sounds

Tap a symbol to copy it

This is an introductory subset, not the complete IPA. Consult the official International Phonetic Association chart for the full inventory.

THE HISTORY OF SOUND

A shared language for describing languages.

Phoneticians needed a better answer than each dictionary and teacher inventing a different way to indicate pronunciation.

03 / HISTORY
  1. The International Phonetic Association begins.

    Paul Passy and other language educators found the association in Paris. Their goal is better language teaching through a practical, shared account of speech sounds.

  2. An early phonetic alphabet takes shape.

    Early published versions develop into the international system of speech notation used today, moving beyond English spelling to represent actual sounds.

  3. The Kiel Convention refines the chart.

    International experts review the IPA. Later revisions continue to reflect phonetic research and the world's diversity of spoken languages.

  4. TODAY

    IPA reaches classrooms and laboratories.

    IPA supports dictionaries, language learning, linguistic documentation, pronunciation instruction, speech research and clinical applications. It is a living reference for describing human language.

History and chart sources: IPA history and official IPA chart.

SEE IT IN ACTION

What do familiar words look like in IPA?

Choose a word to see its broad pronunciation in General American English. Your browser can also speak the example aloud.

04 / EXAMPLES
SPELLINGcat
IPA TRANSCRIPTION/kæt/

Three sounds: /k/ + /æ/ + /t/.

WHY LEARN IT

Pronunciation is more than spelling.

IPA gives people a useful visual map of speech, even when the letters on the page are misleading.

05 / IMPACT
01

Learn new languages

See sounds that your first language may not distinguish, and practice what your mouth and ears need to do differently.

02

Pronounce names respectfully

A phonetic transcription offers a better starting point for unfamiliar names than guessing from their spelling.

03

Understand accents

Different accents may use different vowels or consonants for the same written word. IPA helps describe those differences without calling one wrong.

04

Teach and study speech

Teachers, researchers and speech specialists use phonetic notation to discuss articulation and pronunciation accurately.

05

Build better communication tools

Pronunciation dictionaries and speech-related research benefit from consistent descriptions of spoken sounds.

06

Handle ambiguity

Knowing a pronunciation is not the same as identifying how a name or hostname is spelled. Use spelling words when exact characters matter.

THE OTHER HALF OF THE STORY

Need to spell letters over the phone?

IPA shows how a word sounds. The NATO/ICAO spelling alphabet helps someone hear which exact letters you mean. When spelling a hostname, name or support-ticket number, Alfa through Zulu is the more practical tool.

Explore Alfa to Zulu
WORD TRANSCRIBED IN IPA/kæt/
LETTERS SPELLED BY VOICECharlie - Alfa - Tango

SMORTLER + SI / MADE FOR PEOPLE

Understanding each other is a form of progress.

What started as a way to make radio calls clearer still teaches us something powerful: a little structure can remove a lot of confusion. Kevin Crothers and Violet share these guides so more people can put that idea to work.

Robotic Violet inviting you to learn and communicate clearly