An audiogram is a graphic representation of hearing that plots frequency by hearing level. A pure-tone threshold test measures the lowest level of sounds detected. The line connecting the thresholds across the pitch range reflects the hearing loss level in each ear. [diagram needs] The audiogram pictured is a visual representation of degrees of hearing loss where thresholds are:
Decibel Level in dBHL | Description |
-10 to 20 (or 25 | Normal Hearing |
20 (or 25) to 40 | Mild Hearing Loss |
40 to 55 | Moderate Hearing Loss |
55-70 | Moderately Severe Hearing Loss |
70-90 | Severe Hearing Loss |
90+ | Profound Hearing Loss |

This particular audiogram groups moderate and moderately severe hearing loss levels together. On this audiogram, the hearing loss level is normal (sloping) to severe.