Table 2. Audiometric thresholds (dB HL) of overall and each frequency in the passing and referred hearing groups (n=22,074 ears)

Frequency (kHz)	0.5-1-2-4*	0.5	1	2	3	4	6
Overall
Pass	18.3±10.7	18.8±16.0	16.8±16.8	20.9±18.7	26.8±22.0	31.8±23.9	43.5±25.3
Refer	57.4±18.6	51.0±22.8	55.9±18.6	57.1±21.4	62.7±22.2	65.7±22.6	78.7±21.4
Men
Pass	20.6±11.3	14.8±10.1	12.3±9.5	18.1±14.9	28.0±20.0	37.1±22.9	45.5±24.7
Refer	59.2±17.8	49.1±21.6	54.8±17.3	60.6±20.2	69.3± 20.2	73.5±20.3	83.3±19.1
Women
Pass	16.5±9.9	15.8±10.2	12.7±9.7	16.2±12.2	19.0±14.5	21.3±16.2	35.3±19.9
Refer	56.1±19.1	52.5±22.5	56.2±19.0	55.2±21.7	58.6±22.3	60.5±22.6	76.5±21.9

Mean hearing loss of more than 40 dB using a method of calculating the mean of 4 frequencies [calculated by (a+b+c+d)/4, where 500 (a), 1000 (b), 2,000 (c), 4,000 (d) Hz]