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Strutt|Criteria|Curves|Sound Levels|G-Curve inserts the G-curve into the active row of the worksheet.

The G-curves are provided for use with the ProPG: Gym Acoustics Guidance reference text. The G-curves are based on interpretations of the NR Curves, but are provided at 1/3 octave resolution.

The user may select which G curve to display by entering the curve number in Column D of the active row.

Please note that the G curve is only presented in the reference text from G10 in 5 unit intervals to G50. Strutt will:

• interpolate the values if an intermediate value is entered
• return the G50 curve for any values greater than G50
• return the G10 curve for any values less than G10

G-curve values are reproduced below:

G-Curve	31.5 Hz	40 Hz	50 Hz	63 Hz	80 Hz	100 Hz	125 Hz	160 Hz	200 Hz	250 Hz	315 Hz	400 Hz	500 Hz	630 Hz	800 Hz	1 kHz	1.25 kHz	1.6 kHz	2 kHz	2.5 kHz	3.15 kHz	4 kHz
G50	84	78	71	67	64	61	58	56	54	52	50	49	48	47	46	45	44	43	42	41	41	40
G45	81	74	68	63	59	57	54	52	50	48	46	44	43	42	41	40	39	38	37	36	36	35
G40	78	70	64	59	55	52	50	47	45	43	41	39	38	37	36	35	34	33	32	31	31	30
G35	74	67	60	55	51	48	45	43	41	38	36	34	33	32	31	30	29	28	27	26	25	25
G30	71	63	56	51	47	44	41	38	36	34	31	30	28	27	26	25	24	23	22	21	20	20
G25	67	59	52	47	43	40	37	34	31	29	27	25	23	22	21	20	19	18	17	16	15	14
G20	64	56	49	43	39	35	32	29	27	24	22	20	18	17	16	15	14	13	12	11	10	9
G15	61	52	45	39	35	31	28	25	22	20	17	15	14	12	11	10	9	8	7	6	5	4
G10	57	49	41	35	31	27	24	21	18	15	13	10	9	7	6	5	4	3	2	1	0	-1

Reference: Table G.1, ProPG: Gym Acoustics Guidance, March 2023