Speech Sound Disorder
What Is a Speech Sound Disorder?
A speech sound disorder is a broad term for when a child has difficulty with the sounds of speech. This can mean substituting one sound for another (“wabbit” for “rabbit”), leaving sounds out (“nana” for “banana”), adding sounds, or distorting sounds. When these errors persist beyond the ages they are typically expected to resolve, it may be a speech sound disorder.
There are two main types:
Articulation disorders: difficulty physically producing specific sounds. For example, a child who cannot produce the “r” sound.
Phonological disorders: patterns of sound errors that suggest the child has not fully learned the rules of the sound system. For example, a child who consistently drops the final consonant from every word (“ca” for “cat,” “do” for “dog”).
Children with speech sound disorders, especially phonological disorders, are at higher risk for reading and writing difficulties, because the same sound skills help children connect sounds to letters.
Signs of a Speech Sound Disorder
- Hard to understand, especially for unfamiliar listeners
- Substituting sounds (“tat” for “cat,” “fumb” for “thumb”)
- Leaving sounds off the ends of words
- Simplifying words by dropping syllables (“ephant” for “elephant”)
- Frustration when not understood
- Speech that sounds immature compared to peers
How Speech Therapy Helps
A speech-language pathologist can assess which sounds and patterns affect your child’s clarity and recommend goals based on their needs. Explore our speech sound therapy for the support we offer.
Frequently Asked Questions
What is a speech sound disorder?
A speech sound disorder is when a child has difficulty producing speech sounds correctly or using the right sound patterns, making them harder to understand than expected for their age. This includes articulation disorders (difficulty making specific sounds) and phonological disorders (patterns of sound errors).
When should my child be easy to understand?
As a general guide, a 2-year-old should be understood about 50% of the time by unfamiliar listeners, a 3-year-old about 75%, and a 4-year-old should be mostly understood by everyone. If your child is significantly harder to understand than these benchmarks, an assessment is worthwhile.
What sounds should my child have by what age?
Sound development varies, but most children master 'p,' 'b,' 'm,' 'n,' 'w,' and 'h' by age 3. Sounds like 'k,' 'g,' 'f,' 't,' and 'd' are typically mastered by age 4. Later-developing sounds like 'r,' 'l,' 'sh,' 'ch,' and 'th' may not be fully mastered until age 6–7.