Table 1 Hearing impairment scale (From Goodman, 1965).
From: Acoustics of long vowels in Arabic-speaking children with hearing impairments
Hearing impairment label | Average hearing impairment threshold level in dB (re: 1969 ANSI) |
|---|---|
Normal | −10 to 15 |
Slight | 16–25 |
Mild | 26–40 |
Moderate | 41–55 |
Moderately severe | 56–70 |
Severe | 71–90 |
Profound | 91+ |
