Visual reinforcement audiometry (VRA) is a hearing test designed for babies and young children who are too old for newborn screening but too young to raise their hand when they hear a beep. It works by teaching a child to turn toward a sound by rewarding that head turn with something fun to look at, like a lit-up toy or a short video clip. The test is recommended for children with a developmental age of 5 to 24 months and is considered the gold standard for getting reliable hearing thresholds in this age group.
How the Test Works
VRA is built on a simple principle: if a child learns that turning toward a sound leads to a visual reward, they’ll keep turning. Audiologists call this conditioning, and it happens in stages. First, a sound plays from a speaker while a visual reward activates at the same time, so the child naturally looks toward the light or animation. After a few pairings, the child catches on and begins turning toward the speaker on their own when they hear a sound, anticipating the reward. Once that connection is solid, the audiologist starts lowering the volume in steps to find the quietest sound the child can detect at each pitch.
The visual reward is typically a toy that lights up or moves, such as an illuminated clown figure or an animated toy animal inside a dark box. Some clinics now use short video clips on a screen instead. Research comparing animated toys to video reinforcement in children 16 to 24 months old found that both methods work, but individual children respond better to one or the other. Clinics that test large numbers of young children benefit from having both options available.
What Happens in the Room
A VRA session usually involves two audiologists. One sits with the parent and child, keeping the child calm, centered, and looking forward between sound presentations. The second audiologist controls the test equipment from a separate room or behind a window, choosing when to present sounds and activate the visual reward.
Speakers are placed to the child’s left and right, typically at 90 degrees or sometimes at 45 degrees, at the child’s head height. The visual reinforcer sits next to or on top of each speaker so the child’s head turn toward the sound naturally lands on the reward. Guidelines from the British Society of Audiology recommend the speakers be at least one meter from the child to keep the sound level consistent across the testing area. The child sits on a parent’s lap or in a high chair at the center of this setup.
Sounds are delivered through the speakers as warble tones or narrow-band noise at specific pitches, and the audiologist works through different frequencies to map out how the child hears across the range of speech-relevant sounds. The whole session is usually kept short because young children lose interest quickly, sometimes within 10 to 15 minutes of active testing.
Who Is It For
VRA is the recommended method for children with a developmental age between 5 and 24 months. Chronological age matters less than developmental readiness. A child needs to have enough head and neck control to make a clear, deliberate turn and enough cognitive development to learn the sound-reward connection. Most typically developing babies reach this point around 6 months.
Children older than about 24 months (developmentally) usually graduate to conditioned play audiometry, where they’re taught to do something like drop a block in a bucket each time they hear a sound. Children with developmental disabilities or delays may continue to need VRA well past their second birthday if their developmental age still falls in the 5 to 24 month range. In these cases, the reinforcers sometimes need to be adjusted to hold the child’s attention, since standard rewards may not be motivating enough.
How Accurate Are the Results
VRA gives a true behavioral picture of hearing, meaning it captures the entire auditory pathway from the ear canal to the brain’s processing of sound. This is different from tests like the auditory brainstem response (ABR), which measures electrical signals along the hearing nerve and is often done while a baby sleeps.
Research comparing ABR results from early infancy to later VRA thresholds shows a strong correlation between the two, with statistical correlation values ranging from 0.82 to 0.99 across different frequencies. But the agreement isn’t perfect at the individual level. When ABR was performed at 3 months and VRA before age 2.5, only about 30 to 47 percent of ears showed thresholds within 10 decibels of each other. When ABR was done at 6 months instead, the match improved significantly: 72 to 76 percent of ears fell within 10 decibels.
The gap between earlier ABR and later behavioral results is partly explained by the auditory nervous system still maturing in young infants. The inner ear is fully developed at birth, but the nerve pathways that carry signals to the brain continue to develop, which can cause ABR to overestimate hearing loss in very young babies. This is one reason audiologists consider VRA results essential for confirming or refining an earlier ABR diagnosis before making decisions about hearing aids or other interventions.
Limitations of VRA
The biggest practical limitation is that VRA depends on the child’s cooperation. A fussy, sleepy, or overstimulated child may not condition well, and the session might need to be rescheduled. Some children habituate to the visual reward quickly, meaning it stops being interesting before the audiologist has gathered enough data. When this happens across multiple visits, clinicians may try switching reinforcer types or adjusting the pace of testing.
When sounds come through speakers rather than earphones, VRA measures the response of both ears together. This means it can identify the better-hearing ear’s thresholds but may miss a hearing loss that only affects one side. Insert earphones or small headphones can be used to test each ear individually, though not every young child will tolerate them. For children who won’t keep earphones in, sound field testing through speakers still provides valuable information, just with the understanding that ear-specific details may need to come from ABR or a future test session.
Children with significant motor impairments, visual impairments, or profound developmental delays may not be able to perform the head-turn response reliably. In those cases, audiologists rely more heavily on physiological tests like ABR and otoacoustic emissions, which don’t require any behavioral response from the child.