🔊Sound Level
BelをDecibelに換算
Bel（B）からDecibel（dB）への無料オンライン単位換算ツール。計算式と換算早見表を掲載。
🔊
Sound Level3 単位
⚠️
💡
How the Calculation Works (Linear Scaling)
Formula:
Decibel = Bel × 10
Substitution:1 × 10
Calculated Result:10 dB
Since 1 Bel = 10 Decibels, multiply the value in Bels by 10.
Standard Ratio Factor:1 B = 10 dB
Bel to Decibel Conversion Table
Precomputed values for quick reference and printing.
Bel → Decibel(B → dB)
| Bel | Decibel |
|---|---|
| 1 B | 10 dB |
| 2 B | 20 dB |
| 3 B | 30 dB |
| 4 B | 40 dB |
| 5 B | 50 dB |
| 6 B | 60 dB |
| 7 B | 70 dB |
| 8 B | 80 dB |
| 9 B | 90 dB |
| 10 B | 100 dB |
| 15 B | 150 dB |
| 20 B | 200 dB |
| 25 B | 250 dB |
| 30 B | 300 dB |
| 40 B | 400 dB |
| 50 B | 500 dB |
| 75 B | 750 dB |
| 100 B | 1000 dB |
Decibel → Bel(dB → B)
| Decibel | Bel |
|---|---|
| 1 dB | 0.1 B |
| 2 dB | 0.2 B |
| 3 dB | 0.3 B |
| 4 dB | 0.4 B |
| 5 dB | 0.5 B |
| 6 dB | 0.6 B |
| 7 dB | 0.7 B |
| 8 dB | 0.8 B |
| 9 dB | 0.9 B |
| 10 dB | 1 B |
| 15 dB | 1.5 B |
| 20 dB | 2 B |
| 25 dB | 2.5 B |
| 30 dB | 3 B |
| 40 dB | 4 B |
| 50 dB | 5 B |
| 75 dB | 7.5 B |
| 100 dB | 10 B |
📌 Standard Benchmark Reference Values
10 dB=1 B (bel)
Standard tenfold logarithmic power ratio definition (1 B = 10 dB).
Exact RatioBel (B)
A dimensionless logarithmic level ratio unit defined as the base-10 logarithm of a power ratio (L = log₁₀(P/P₀)). In sound level measurement, 1 bel represents a tenfold change in power ratio.
Decibel (dB)
One tenth of a bel (1 dB = 0.1 B). In acoustic measurements, sound level L (dB) = 10 log₁₀(P/P₀) = 20 log₁₀(p/p₀) for root-power quantities.
🔗