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Table 2 NormalizedPercentage of responses at various frequencies

From: Extended high-frequency audiometry in healthy adults with different age groups

Frequency (kHz) 21–30 years
(46 ears)
31–40 years
(50 ears)
41–50 years
(88 ears)
51–60 years
(78 ears)
61–70 years
(62 ears)
0.25–2 100.0 100.0 100.0 100.0 100.0
4 100.0 100.0 100.0 100.0 100.0
6 100.0 100.0 100.0 100.0 100.0
8 100.0 100.0 100.0 100.0 100.0
9 100.0 100.0 100.0 100.0 97.4
10 100.0 100.0 100.0 100.0 97.4
11.5 100.0 100.0 100.0 92.3 90.3
12.5 100.0 100.0 93.2 82.1 74.2
14 100.0 96.0 79.5 59.0 45.2
16 100.0 64.0 38.6 30.8 16.1
18 78.3 20.0 2.3 2.6 0.0
20 52.2 8.0 2.3 0.0 0.0