Articulation & Phonology

Articulation and phonology are both related to how children produce speech sounds and how easily they can be understood by others.

This guide highlights common speech sound development milestones and signs that your child may benefit from additional support.

Apraxia

Childhood apraxia of speech is a motor speech disorder that can make it difficult for children to plan and coordinate the movements needed for clear speech. A child may know what they want to say, but have trouble getting the sounds, syllables, or words out consistently.

Articulation

Articulation refers to how children produce individual speech sounds. Some children may substitute, leave out, or distort sounds, which can make their speech harder to understand.

Phonology

Phonology refers to the patterns children use when learning speech sounds. For example, a child may consistently leave off final sounds or replace one group of sounds with another. Some patterns are expected at certain ages, while others may need support.

Speech Sound Milestones

Children develop speech sounds gradually over time. These milestones are general guidelines, and every child develops at their own pace.

By Age 2

Many children are beginning to use early sounds like p, b, m, h, w and may be understood by familiar listeners some of the time.

By Age 3

Children often become easier to understand and may use sounds like t, d, k, g, f, n more consistently.

By Age 4

Speech should be understandable to most people most of the time. Children may continue developing later sounds and blends.

By Age 5

Many children are using most speech sounds clearly, though some sounds like r, th, s, z, l may continue developing.

By Age 6+

Later-developing sounds and more complex sound patterns continue to refine. If speech is still difficult for others to understand, support may be helpful.