The results of a hearing test are plotted on a chart called an audiogram. Hearing level (HL) is measured in decibels (dB) and is presented in general categories as follows:
Normal hearing (0-25 dB HL)
Mild hearing loss (26-40 dB HL)
Moderate hearing loss (41-70dB HL)
Severe hearing loss (71-90 dB HL)
Profound hearing loss (greater than 90 dB HL)