At what age can a child be tested for auditory processing disorder?

Most audiology departments will not carry out formal APD testing until a child is at least seven years old. The tests require the child to listen carefully and respond to subtle differences in sounds, which younger children find difficult regardless of whether they have APD. If you suspect APD in a younger child, your audiologist can still carry out baseline assessments and monitor development over time.

Can a child have both APD and hearing loss?

Yes, though it is relatively uncommon. A child can have a sensorineural hearing loss affecting the inner ear and separately have difficulty processing the sounds that do reach the brain. If your child has a known hearing loss but seems to struggle more than their audiogram would predict, it is worth discussing the possibility of co-occurring APD with your audiologist.

Auditory Processing Disorder vs Deafness in Children

When a child struggles to hear in noisy environments, misses instructions, and asks people to repeat themselves constantly, the natural assumption is that they have a hearing problem. Sometimes they do. But sometimes their hearing is perfectly normal and the difficulty lies in how the brain processes sound.

Auditory processing disorder (APD) is one of the more confusing conditions parents encounter, precisely because it looks so much like hearing loss from the outside. Understanding the difference matters, because the management strategies, while overlapping, are not identical.

What Is Auditory Processing Disorder?

APD is a condition in which the ears detect sound normally but the brain has difficulty making sense of what it hears. The auditory nerve carries the signal from the ear to the brain without any problem, but somewhere in the central auditory system, the processing goes awry.

This can manifest in several ways:

Difficulty understanding speech in background noise, even when hearing is normal in quiet conditions
Problems distinguishing between similar-sounding words ("cap" vs "cat", "pin" vs "bin")
Difficulty following spoken instructions, especially if they are long or complex
Trouble localising where a sound is coming from
Delayed response to spoken language, as though there is a processing lag
Difficulty with phonics and reading, because the auditory foundations of phonological awareness are affected

The NHS describes APD as a hearing difficulty that affects the way the brain processes sound. It is estimated to affect around 2 to 7 percent of children, though exact figures are debated because diagnostic criteria vary.

How APD Differs from Hearing Loss

The fundamental difference is where the problem sits. Hearing loss (whether conductive or sensorineural) means that sound does not reach the brain at full volume or clarity. The ear itself is not functioning as it should. APD means that sound reaches the brain just fine, but the brain struggles to interpret it.

In practical terms:

A child with hearing loss will fail a standard hearing test (audiogram). A child with APD will pass it.
Hearing aids help a child with hearing loss by making sounds louder. They do not typically help a child with APD, because the issue is not volume but processing.
A child with hearing loss has consistent difficulty regardless of the listening environment. A child with APD may hear perfectly well in a quiet room but fall apart in a noisy classroom.

That said, the day-to-day experience of both conditions can look remarkably similar, especially in a school setting. Both children will ask "what?" frequently, appear inattentive, struggle with instructions, and potentially fall behind with reading and writing.

Overlapping Symptoms

The overlap between APD and other conditions is one reason diagnosis can be complicated. The symptoms of APD also overlap with:

ADHD: Both involve apparent inattention and difficulty following instructions. A child with ADHD has difficulty sustaining attention; a child with APD has difficulty processing the auditory information that attention depends on.
Dyslexia: Both affect phonological awareness and reading development. Some researchers believe APD and dyslexia share underlying auditory processing weaknesses.
Language disorder: A child with a developmental language disorder may also struggle with spoken instructions and vocabulary, but the cause is a broader language processing difficulty rather than specifically auditory.

A thorough assessment should consider all of these possibilities. APD is a diagnosis of exclusion in some respects. The audiologist needs to rule out hearing loss, and the broader team needs to consider whether the difficulties are better explained by another condition.

The Diagnosis Process

APD is diagnosed by a specialist audiologist, not by a GP, teacher, or speech therapist. The assessment involves a battery of tests that measure specific auditory processing skills:

Dichotic listening tests: Different sounds are played to each ear simultaneously, and the child must identify what they hear in each ear.
Temporal processing tests: The child identifies gaps in sound or differences in the timing of sounds.
Speech-in-noise tests: The child repeats words or sentences presented against background noise.
Auditory pattern recognition: The child identifies patterns in sequences of sounds that vary in pitch, duration, or intensity.

Getting a referral can take time. Start with your GP, who can refer to audiology. If your child already has a hearing professional involved, ask them about APD assessment. Some areas have long waiting lists, and not all audiology departments offer APD testing. The RNID (formerly Action on Hearing Loss) maintains information on APD services across the UK.

Management Strategies

There is no cure for APD, but the right strategies can significantly reduce its impact. Management typically combines environmental modifications, compensatory strategies, and sometimes direct auditory training.

At School

Preferential seating close to the teacher, away from noise sources (windows, corridors, projector fans)
Use of an FM or radio aid system to deliver the teacher's voice directly, reducing the impact of background noise
Visual support for spoken instructions (written task lists, diagrams, visual timetables)
Pre-teaching of new vocabulary before it comes up in lessons
Checking understanding with short, specific questions rather than "Do you understand?"
Acoustic treatment of the classroom (soft furnishings, carpet, acoustic panels)

Many of these strategies are the same ones used for deaf children, which is why some children with APD end up being supported by the same professionals. Our hearing aids guide covers how amplification technology works, and while hearing aids are not the primary intervention for APD, FM systems (which use similar technology) often are.

At Home

Reduce background noise during conversations (turn off the television, close windows)
Face your child when speaking and use their name to get their attention first
Keep instructions short and break them into steps
Encourage your child to ask for repetition without embarrassment
Use visual supports: written lists, picture schedules, gesture alongside speech

When to Suspect APD

If your child has passed a hearing test but continues to show the kinds of listening difficulties described above, APD is worth investigating. This is especially true if the difficulties are more pronounced in noisy environments and if there is no clear alternative explanation such as ADHD or a language disorder.

Talk to your child's school and GP. Keep a diary of specific situations where your child struggles, as this helps professionals understand the pattern. If your child has any level of confirmed hearing loss and you suspect additional processing difficulties on top, mention this to their audiologist at the next appointment.

For families who have recently learned their child has any form of hearing difficulty, our newly diagnosed resource provides a starting point for navigating the system. And for more on how deaf children manage in mainstream classrooms, our mainstream schools guide covers the educational landscape.