dB(デシベル)と倍率の関係
dB = 20 × Log10 倍率
倍率 = 10 ^ (dB / 20) ( ^ はべき乗)
C言語的に書けば、
dB = 20 * log (ratio)
ratio = pow ( 10.0, dB/20.0)
| dB | 倍率 |
|---|---|
| -50 | 0.0031622776601683794 |
| -49 | 0.0035481338923357532 |
| -48 | 0.003981071705534973 |
| -47 | 0.0044668359215096305 |
| -46 | 0.005011872336272725 |
| -45 | 0.005623413251903491 |
| -44 | 0.00630957344480193 |
| -43 | 0.00707945784384138 |
| -42 | 0.007943282347242814 |
| -41 | 0.008912509381337459 |
| -40 | 0.01 |
| -39 | 0.011220184543019636 |
| -38 | 0.012589254117941675 |
| -37 | 0.01412537544622754 |
| -36 | 0.015848931924611134 |
| -35 | 0.01778279410038923 |
| -34 | 0.0199526231496888 |
| -33 | 0.0223872113856834 |
| -32 | 0.025118864315095794 |
| -31 | 0.028183829312644536 |
| -30 | 0.03162277660168379 |
| -29 | 0.03548133892335755 |
| -28 | 0.039810717055349734 |
| -27 | 0.0446683592150963 |
| -26 | 0.05011872336272722 |
| -25 | 0.05623413251903491 |
| -24 | 0.06309573444801933 |
| -23 | 0.0707945784384138 |
| -22 | 0.07943282347242814 |
| -21 | 0.08912509381337455 |
| -20 | 0.1 |
| -19 | 0.11220184543019636 |
| -18 | 0.12589254117941673 |
| -17 | 0.14125375446227545 |
| -16 | 0.15848931924611134 |
| -15 | 0.1778279410038923 |
| -14 | 0.19952623149688797 |
| -13 | 0.22387211385683395 |
| -12 | 0.251188643150958 |
| -11 | 0.28183829312644537 |
| -10 | 0.31622776601683794 |
| -9 | 0.35481338923357547 |
| -8 | 0.3981071705534972 |
| -7 | 0.44668359215096315 |
| -6 | 0.5011872336272722 |
| -5 | 0.5623413251903491 |
| -4 | 0.6309573444801932 |
| -3 | 0.7079457843841379 |
| -2 | 0.7943282347242815 |
| -1 | 0.8912509381337456 |
| 0 | 1 |
| 1 | 1.1220184543019633 |
| 2 | 1.2589254117941673 |
| 3 | 1.4125375446227544 |
| 4 | 1.5848931924611136 |
| 5 | 1.7782794100389228 |
| 6 | 1.9952623149688795 |
| 7 | 2.2387211385683394 |
| 8 | 2.51188643150958 |
| 9 | 2.8183829312644537 |
| 10 | 3.1622776601683795 |
| 11 | 3.548133892335755 |
| 12 | 3.9810717055349722 |
| 13 | 4.466835921509632 |
| 14 | 5.011872336272722 |
| 15 | 5.623413251903491 |
| 16 | 6.309573444801933 |
| 17 | 7.079457843841379 |
| 18 | 7.943282347242816 |
| 19 | 8.912509381337454 |
| 20 | 10 |
| 21 | 11.220184543019636 |
| 22 | 12.589254117941675 |
| 23 | 14.12537544622754 |
| 24 | 15.848931924611133 |
| 25 | 17.78279410038923 |
| 26 | 19.952623149688797 |
| 27 | 22.3872113856834 |
| 28 | 25.118864315095795 |
| 29 | 28.183829312644534 |
| 30 | 31.622776601683793 |
| 31 | 35.48133892335755 |
| 32 | 39.810717055349734 |
| 33 | 44.6683592150963 |
| 34 | 50.11872336272722 |
| 35 | 56.23413251903491 |
| 36 | 63.09573444801933 |
| 37 | 70.79457843841381 |
| 38 | 79.43282347242814 |
| 39 | 89.12509381337455 |
| 40 | 100 |
| 41 | 112.2018454301963 |
| 42 | 125.89254117941675 |
| 43 | 141.2537544622754 |
| 44 | 158.48931924611142 |
| 45 | 177.82794100389228 |
| 46 | 199.52623149688787 |
| 47 | 223.872113856834 |
| 48 | 251.18864315095797 |
| 49 | 281.8382931264455 |
| 50 | 316.22776601683796 |