Grade of hearing impairment | EU working group (1996) |
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Mild hearing impairment | 20 dB < BEHL0.5-4 kHz< 40 dB |
Moderate hearing impairment | 40 dB ≤ BEHL0.5-4 kHz< 70 dB |
Severe hearing impairment | 70 dB ≤ BEHL0.5-4 kHz< 95 dB |
Profound hearing impairment | BEHL0.5-4 kHz≥ 95 dB |