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Il dB to Normal Value Calculator convertiti decibels (dB) into standard linear values. Da decibels represent a logarithmic scale, this calculator helps in converting them into assoluto energia, voltage, or intensity values that are easier to interpret.
This conversion is essential in:
- Ingegneria audio – Adjusting sound levels in linear scale
- Radio frequency (RF) transmission – Measuring signal power
- Elettronica e telecomunicazioni – Evaluating power and voltage ratios
- Acoustics and sound pressure misurazioni – Converting SPL (Livello di pressione sonora) to linear values
By using this tool, engineers, scientists, and sound technicians può con precisione interpret dB values in real-world applications.
Formula for Db To Normal Value Calculator
1. Convert dB to Linear Value for Power
Quando si lavora con power-related measurements (e.g., watts, intensity), use:
Linear Value = 10^(dB / 10)
Dove:
- dB = Il decibel value to convert
- 10 ^ = Base-10 exponentiation
2. Convert dB to Linear Value for Voltage or Amplitude
Per voltage, amplitude, or current measurements, Usare:
Linear Value = 10^(dB / 20)
Since power is proportional to the square of voltage, the logarithmic formula for voltage has a fattore di 20 invece di 10.
Reference Table – Common dB to Normal Value Conversions
For convenience, here’s a pre-calculated reference table showing commonly used dB values and their corresponding linear values:
| Decibel (dB) | Power Ratio (10^(dB/10)) | Voltage/Amplitude Ratio (10^(dB/20)) |
|---|---|---|
| -30 DB | 0.001 | 0.032 |
| -20 DB | 0.01 | 0.1 |
| -10 DB | 0.1 | 0.316 |
| -6 DB | 0.25 | 0.5 |
| -3 DB | 0.5 | 0.707 |
| 0 dB | 1 | 1 |
| +3dB | 2 | 1.414 |
| +6dB | 4 | 2 |
| +10dB | 10 | 3.162 |
| +20dB | 100 | 10 |
| +30dB | 1000 | 31.62 |
This table is useful for quick approximations quando si lavora con audio levels, signal processing, and telecommunications.
Example of Db To Normal Value Calculator
1. Convert +10 dB to a Power Ratio
Usando il formula di potenza:
Linear Value = 10^(10 / 10)
Linear Value = 10^1 = 10
Questo significa a +10 dB increase results in a 10× power increase.
2. Convert -6 dB to a Voltage Ratio
Usando il formula della tensione:
Linear Value = 10^(-6 / 20)
Linear Value ≈ 10^(-0.3) ≈ 0.5
Questo significa a -6 dB reduction cuts the voltage to 50% of the original value.
Domande frequenti più comuni
Decibels simplify very large or very small changes in power and intensity. Since human perception is logarithmic (e.g., hearing and vision), dB provides a more natural scale for comparing signals.
A negative dB value indica attenuazione (perdita), meaning the signal is decreasing in power or amplitude. Per esempio, -3 dB means half power.
Yes! This calculator applies to audio signals, RF power measurements, electrical circuits, and even light intensity comparisons.