Speechace
  • Introduction
    • Overview
    • Use-Cases
  • Getting Started
    • Pre-requisites
      • API Features
      • Getting the API Key
      • API Regions and endpoints
      • API Limits
    • API Samples
    • Supported Languages
    • API Versioning
    • Authentication
    • Try the Speechace API
    • Error Handling
      • Common Errors
      • Retry Strategies
  • Solutions
    • Speaking Practice for Language Learning
    • Automated Language Assessment with AI
    • Voice AI for Early Literacy
    • Test Prep for Standardized tests
      • PTE Speaking Questions
      • IELTS Speaking Questions
      • TOEFL Speaking Questions
      • CEFR Speaking Questions
      • TOEIC Speaking Questions
    • Speaking Practice in Spanish and French
  • Features
    • Introduction
    • Scripted activities
      • Pronunciation Scoring
        • Word and Sentence pronunciation
        • Multiple choice
        • Custom pronunciations
        • Phoneme list
      • Fluency scoring
        • Passage scoring
      • Lexical stress and intonation
    • Spontaneous activities
      • Open-ended scoring
        • Language scoring
        • Relevance scoring
        • Language detection
      • Task achievement scoring
        • Describe Image
        • Re-tell Lecture
        • Answer Question
  • API Reference
    • Postman API reference
    • Score Text/Pronunciation
      • Handling overall scores
      • Handling word scores
      • Handling phoneme and syllable scores
    • Score Text/Multiple choice
      • Handling multiple choice response
    • Score Text/Markup Language
      • Handling Markup Response
    • Score Text/Stress & Intonation
      • Handing stress and intonation response
    • Score Text/Phoneme list
      • Handling phoneme list response
    • Score Text/Fluency
      • Handling fluency response
      • Fidelity detection
    • Score Text/Validate Text
    • Score Speech/Open-ended
      • Handling language scores
      • Per metric feedback
        • Grammar metrics
        • Vocabulary metrics
        • Coherence metrics
    • Score Speech/Relevance
      • Handling relevance response
    • Score Speech/Language Detection
    • Score Task/Task Achievement
  • Guides on common topics
    • Intepreting quality score
    • Interpreting overall scores
      • Pronunciation Bands
      • Fluency Bands
      • Vocabulary Bands
      • Grammar Bands
      • Coherence Bands
    • Scoring rubrics
    • Interpreting fidelity class
    • Phonetic notation
    • Getting word timestamps in audio
    • Automatic handling of unknown words
    • Phoneme to letter mapping
    • Markup Language
  • Other Resources
    • Requesting Support
    • Rate Limiting
    • Data Retention
    • FAQs
    • Appendices
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  1. Guides on common topics

Phonetic notation

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Last updated 6 months ago

The Speechace API returns phoneme level feedback using the Arpabet phonetic notation.

You can map the phoneme notation to the commonly used IPA (International Phonetic Alphabet) using the below tables:

US English (en-us):

UK English (en-gb):

In cases of silence or noise, the API may also return the following phoneme codes: