Appendix to Part 62

Appendix to - Appendix to Part 62

Table 62-1—Reference Duration

dBA	T (hours)	80	32.0	85	16.0	86	13.9	87	12.1	88	10.6	89	9.2	90	8.0	91	7.0	92	6.1	93	5.3	94	4.6	95	4.0	96	3.5	97	3.0	98	2.6	99	2.3	100	2.0	101	1.7	102	1.5	103	1.3	104	1.1	105	1.0	106	0.87	107	0.76	108	0.66	109	0.57	110	0.50	111	0.44	112	0.38	113	0.33	114	0.29	115	0.25

At no time shall any excursion exceed 115 dBA. For any value, the reference duration (T) in hours is computed by: T = 8/2(L−90)/5 where L is the measured A-weighted, slow-response sound pressure level.

Table 62-2—“Dose”TWA 8 Equivalent

Dose	TWA 8 (percent)	25	80	29	81	33	82	38	83	44	84	50	85	57	86	66	87	76	88	87	89	100	90	115	91	132	92	152	93	174	94	200	95	230	96	264	97	303	98	350	99	400	100	460	101	530	102	610	103	700	104	800	105	920	106	1056	107	1213	108	1393	109	1600	110	1838	111	2111	112	2425	113	2786	114	3200	115

Interpolate between the values found in this Table, or extend the Table, by using the formula: TWA8 = 16.61 log10 (D/100) + 90.

Table 62-3—Age Correction Value in Decibels for Males (Selected Frequencies)

Age (years)	kHz			2	3	4	20 or less	3	4	5	21	3	4	5	22	3	4	5	23	3	4	6	24	3	5	6	25	3	5	7	26	4	5	7	27	4	6	7	28	4	6	8	29	4	6	8	30	4	6	9	31	4	7	9	32	5	7	10	33	5	7	10	34	5	8	11	35	5	8	11	36	5	9	12	37	6	9	12	38	6	9	13	39	6	10	14	40	6	10	14	41	6	10	14	42	7	11	16	43	7	12	16	44	7	12	17	45	7	13	18	46	8	13	19	47	8	14	19	48	8	14	20	49	9	15	21	50	9	16	22	51	9	16	23	52	10	17	24	53	10	18	25	54	10	18	26	55	11	19	27	56	11	20	28	57	11	21	29	58	12	22	31	59	12	22	32	60 or more	13	23	33

Table 62-4—Age Correction Value in Decibels for Females (Selected Frequencies)

Age (years)	kHz			2	3	4	20 or less	4	3	3	21	4	4	3	22	4	4	4	23	5	4	4	24	5	4	4	25	5	4	4	26	5	5	4	27	5	5	5	28	5	5	5	29	5	5	5	30	6	5	5	31	6	6	5	32	6	6	6	33	6	6	6	34	6	6	6	35	6	7	7	36	7	7	7	37	7	7	7	38	7	7	7	39	7	8	8	40	7	8	8	41	8	8	8	42	8	9	9	43	8	9	9	44	8	9	9	45	8	10	10	46	9	10	10	47	9	10	11	48	9	11	11	49	9	11	11	50	10	11	12	51	10	11	12	52	10	12	13	53	10	13	13	54	11	13	14	55	11	14	14	56	11	14	15	57	11	15	15	58	12	15	16	59	12	16	16	60 or more	12	16	17

[64 FR 49630, Sept. 13, 1999, as amended at 65 FR 66929, Nov. 8, 2000]