TABLE 2.

Audiometric data for normal-hearing and hearing-impaired listeners

Listener	Age	250	500	1000	1500	2000	3000	4000	6000	8000 (Hz)
NH1	27	10	10	5	–	10	15	10	5	10
NH2	47	10	10	10	5	15	10	10	10	0
NH3	32	10	5	5	–	5	−5	0	−5	−5
NH4	57	15	15	15	15	5	5	10	5	20
NH5	59	0	0	5	10	10	10	5	20	20
NH6	73	35	20	10	–	25	25	15	10	25
HI1	65	35	40	30	30	30	30	40	35	30
HI2	81	40	40	60	55	60	65	70	70	65
HI3	71	35	40	45	35	35	45	40	30	35
HI4	74	35	40	40	–	30	30	35	45	40
HI5	71	40	40	35	35	45	45	40	45	50
HI6	73	25	35	35	35	40	45	60	65	60

Thresholds are reported in dB HL (ANSI 2004)