6
Types of hearing loss
250
500
1000
125
0
2000
4000
8000
10
20
30
40
50
60
70
80
90
100
110
120
FREQUENCY IN CYCLES PER SECOND (Hz)
H
E
A
R
IN
G
L
E
V
E
L
S
I
N
D
E
C
IB
E
L
S
(
D
b
)
Mild
Moderate
Moderately-severe
Severe
Profound
Audiogram of familiar sounds
Please note:
People often have hearing
thresholds spanning two or
more of these classes of
hearing loss in different
pitches / ears.