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1/3 Ocatve Band list(JIS C 1514 / IEC 61260)
| Band No. | 中心周波数 fc [Hz] | 下限周波数 f1 [Hz] | 上限周波数 f2 [Hz] | 帯域幅 Δf [Hz] |
|---|---|---|---|---|
| 1 | 16 | 14.1 | 17.8 | 3.70 |
| 2 | 20 | 17.8 | 22.4 | 4.63 |
| 3 | 25 | 22.4 | 28.2 | 5.79 |
| 4 | 31.5 | 28.2 | 35.5 | 7.29 |
| 5 | 40 | 35.5 | 44.7 | 9.26 |
| 6 | 50 | 44.7 | 56.2 | 11.6 |
| 7 | 63 | 56.2 | 70.8 | 14.6 |
| 8 | 80 | 70.8 | 89.1 | 18.5 |
| 9 | 100 | 89.1 | 112 | 23.2 |
| 10 | 125 | 112 | 141 | 29.0 |
| 11 | 160 | 141 | 178 | 37.1 |
| 12 | 200 | 178 | 224 | 46.3 |
| 13 | 250 | 224 | 282 | 57.9 |
| 14 | 315 | 282 | 355 | 72.9 |
| 15 | 400 | 355 | 447 | 92.6 |
| 16 | 500 | 447 | 562 | 116 |
| 17 | 630 | 562 | 708 | 146 |
| 18 | 800 | 708 | 891 | 185 |
| 19 | 1000 | 891 | 1120 | 232 |
| 20 | 1250 | 1120 | 1410 | 290 |
| 21 | 1600 | 1410 | 1780 | 371 |
| 22 | 2000 | 1780 | 2240 | 463 |
| 23 | 2500 | 2240 | 2820 | 579 |
| 24 | 3150 | 2820 | 3550 | 729 |
| 25 | 4000 | 3550 | 4470 | 926 |
| 26 | 5000 | 4470 | 5620 | 1160 |
| 27 | 6300 | 5620 | 7080 | 1460 |
| 28 | 8000 | 7080 | 8910 | 1850 |
| 29 | 10000 | 8910 | 11200 | 2320 |
| 30 | 12500 | 11200 | 14100 | 2900 |
| 31 | 16000 | 14100 | 17800 | 3710 |
| 32 | 20000 | 17800 | 22400 | 4630 |