Sound Converter - Convert Decibel, Bel, Neper & Sound Intensity Units
Result:
60 dB = 6 B
How Sound Conversion Works
Input Value
Enter sound level value
Select Units
Choose from and to units
Convert
Apply logarithmic formula
Sound Conversion Formulas
Decibel to Bel
B = dB ÷ 10
Example: 60 dB = 60 ÷ 10 = 6 B
Bel to Decibel
dB = B × 10
Example: 3 B = 3 × 10 = 30 dB
Decibel to Neper
Np = dB ÷ 8.686
Example: 20 dB = 20 ÷ 8.686 = 2.303 Np
Neper to Decibel
dB = Np × 8.686
Example: 1 Np = 1 × 8.686 = 8.686 dB
Sound Conversion Table
| Decibel (dB) | Bel (B) | Neper (Np) | Sound Level |
|---|---|---|---|
| 0 | 0.0 | 0.000 | Threshold of hearing |
| 10 | 1.0 | 1.151 | Various sounds |
| 20 | 2.0 | 2.303 | Whisper |
| 30 | 3.0 | 3.454 | Various sounds |
| 40 | 4.0 | 4.605 | Quiet room |
| 50 | 5.0 | 5.756 | Various sounds |
| 60 | 6.0 | 6.908 | Normal conversation |
| 70 | 7.0 | 8.059 | Various sounds |
| 80 | 8.0 | 9.210 | City traffic |
| 90 | 9.0 | 10.362 | Various sounds |
| 100 | 10.0 | 11.513 | Motorcycle |
| 110 | 11.0 | 12.664 | Various sounds |
| 120 | 12.0 | 13.815 | Rock concert |
| 130 | 13.0 | 14.967 | Various sounds |
| 140 | 14.0 | 16.118 | Jet engine |
Sound Units Progression Chart
20 dB
40 dB
60 dB
80 dB
100 dB
120 dB
Practice Problems
Problem 1:
Convert 85 dB to Bel
Solution: 85 ÷ 10 = 8.5 B
Problem 2:
Convert 4.5 B to dB
Solution: 4.5 × 10 = 45 dB
Problem 3:
Convert 50 dB to Neper
Solution: 50 ÷ 8.686 = 5.757 Np
Problem 4:
Convert 2.5 Np to dB
Solution: 2.5 × 8.686 = 21.715 dB
Problem 5:
Convert 7 B to Neper
Solution: (7 × 10) ÷ 8.686 = 8.058 Np
Daily Uses of Sound Measurement
Audio equipment calibration uses decibel measurements for optimal performance
Noise pollution monitoring protects public health in urban areas
Hearing protection standards prevent workplace hearing damage
Concert venue sound engineering ensures audience safety and enjoyment
Smartphone volume controls use decibel scales for user convenience