SLP Draft
Free reference · No account

Speech sound norms

Typical age of mastery by sound — the quick version for screenings, parent questions, and "is this still age-appropriate?" moments.

Single sounds

  • By 3
    /p//b//m//n//h//w/
  • By 4
    /t//d//k//g//f//ng//y/
  • By 5
    /v//s//z//ch//sh//j//l/
  • By 6–7
    /r//th (voiced)//th (voiceless)//zh/

Clusters

  • By 4–5
    s-clusters (sp, st, sk, sm, sn, sw, sl)
  • By 5–6
    l-clusters (bl, cl, fl, gl, pl, sl)
  • By 6–7
    r-clusters (br, cr, dr, fr, gr, pr, tr)
Based on cross-linguistic acquisition data (McLeod & Crowe, 2018) — the age by which most children (90–100%) produce the sound correctly. Norms are a reference, not a cutoff: always weigh stimulability, intelligibility, error patterns, and the child's whole profile before making eligibility decisions.