Does a VRA System Need Calibration?
One of the most common questions in pediatric audiology is whether a VRA system needs to be calibrated. The answer depends on what the term “calibration” refers to.
Audio Calibration
VRA equipment itself does not generate calibrated sound. The audiometer is the device responsible for delivering calibrated signals. As long as the audiometer is calibrated according to ANSI standards, the audio portion of the VRA test remains accurate.
The VRA system simply presents the visual reinforcement once the child responds.
Visual Calibration
There is no formal visual calibration standard in Visual Reinforcement Audiometry. However, consistency matters.
Clinics should verify that:
• The left and right reinforcers activate at the correct moment
• The reinforcers are bright and visible from the child’s position
• The timing of activation matches the audiologist’s expectations
Modern software based systems make this easier because they remove the mechanical delays found in older VRA boxes.
Positioning and Setup
Although VRA systems do not require calibration in the same way an audiometer does, proper setup is essential.
• Reinforcers should be placed at roughly 45 degrees to the child
• The height should match eye level
• The center reinforcer should help maintain attention without overpowering the side reinforcers
New features like House Rules in Flex VRA allow clinics to keep the center screen simple and add consistency to the test.
When to Recheck Your VRA Equipment
You should review your VRA system if you notice:
• Delayed activation
• Dim or inconsistent displays
• Loose mounts or shifted positions
• Software not responding correctly
These checks help maintain accurate and repeatable VRA sessions.
Summary
A VRA system does not require formal calibration, but proper setup, clean activation timing, and consistent visibility are essential for reliable Visual Reinforcement Audiometry. Using well designed VRA equipment ensures accurate responses and smooth pediatric hearing evaluations.