Значение и для третьоктавных фильтров по ГОСТ 17168-82.
Номер полосы | Средняя частота, Гц | Граничные частоты, Гц | Ширина полосы, , Гц | , дБ | ||
1 | 31,5 | 28,0 и | 35,5 | 7,5 | 2,74 | 8,8 |
2 | 40,0 | 35,5 и | 45,0 | 9,5 | 3,08 | 9,8 |
3 | 50,0 | 45,0 и | 56,0 | 11,0 | 3,32 | 10,4 |
4 | 63,0 | 56,0 и | 71,0 | 15,0 | 3,87 | 11,8 |
5 | 80,0 | 71,0 и | 90,0 | 19,0 | 4,36 | 12,8 |
6 | 100,0 | 90,0 и | 112,0 | 22,0 | 4,69 | 13,4 |
7 | 125,0 | 112,0 и | 140,0 | 28,0 | 5,29 | 14,5 |
8 | 160,0 | 140,0 и | 180,0 | 40,0 | 6,32 | 16,0 |
9 | 200,0 | 180,0 и | 224,0 | 44,0 | 6,63 | 16,4 |
10 | 250,0 | 224,0 и | 280,0 | 56,0 | 7,48 | 17,5 |
11 | 315,0 | 280,0 и | 335,0 | 75,0 | 8,66 | 18,8 |
12 | 400,0 | 335,0 и | 450,0 | 95,0 | 9,75 | 19,8 |
13 | 500,0 | 450,0 и | 560,0 | 110,0 | 10,49 | 20,4 |
14 | 630,0 | 560,0 и | 710,0 | 150,0 | 12,25 | 21,8 |
15 | 800,0 | 710,0 и | 900,0 | 190,0 | 13,78 | 22,8 |
16 | 1000,0 | 900,0 и | 1120,0 | 220,0 | 14,83 | 23,4 |
17 | 1250,0 | 1120,0 и | 1400,0 | 280,0 | 16,73 | 24,5 |
18 | 1600,0 | 1400,0 и | 1800,0 | 400,0 | 20,00 | 26,0 |
19 | 2000,0 | 1800,0 и | 2240,0 | 440,0 | 20,98 | 26,4 |
20 | 2500,0 | 2240,0 и | 2800,0 | 560,0 | 23,66 | 27,5 |
21 | 3150,0 | 2800,0 и | 3550,0 | 750,0 | 27,39 | 28,8 |
22 | 4000,0 | 3550,0 и | 4500,0 | 950,0 | 30,82 | 29,8 |
23 | 5000,0 | 4500,0 и | 5600,0 | 1100,0 | 33,17 | 30,4 |
24 | 6300,0 | 5600,0 и | 7100,0 | 1500,0 | 38,73 | 31,8 |
25 | 8000,0 | 7100,0 и | 9000,0 | 1900,0 | 43,59 | 32,8 |
(Измененная редакция, Изм. N 1).