Here is a sample audiogram with the different categories of hearing loss severity:What the numbers mean:
Your audiologist is interested in how loud the sound has to be before your child responds. Put another way, your audiologist is measuring the softest sound your child can hear. The softest level at which your child can hear a sound is called the threshold.
What the symbols on the graph mean:
The symbols represent the quietest level your child responded to at each frequency (pitch) during the hearing test.
Definition of normal hearing:
The range for normal hearing is defined as hearing thresholds of -10 to 15 dB at all frequencies (0 to 20 dB when testing babies through the speakers).
Categories of hearing loss by severity:
Most children have hearing loss in more than one category. For example, your child might have better hearing in the low pitches than the high pitches. If this is the case, hearing loss might be described as falling under more than one category (e.g. a mild to moderately-severe hearing loss).
Download the pamphlet on How to Read Your Child's Audiogram (PDF).