Il dB to Pressure Calculator convertiti decibel (dB) values into actual pressure misurazioni. Since decibels represent a scala logaritmica, this tool helps in converting them into linear pressure units (Pascals, Pa), che sono comunemente usati in acoustics, audio engineering, and physics.
This calculator is essential in:
- Livello di pressione sonora (SPL). – Converting dB into actual pressure values
- Environmental noise monitoring – Measuring air pressure fluctuations
- Hearing science and audiology – Understanding safe exposure limits
- Audio and microphone calibration – Ensuring accurate SPL readings
By using this tool, engineers, sound technicians, and researchers può interpret dB values in real-world pressure units.
Formula for Db To Pressure Calculator
Dal sound pressure is proportional to amplitude, we use the following equation:
Formula generale
Pressure (Pa) = Reference Pressure × 10^(dB / 20)
Dove:
- dB = The decibel level to convert
- Reference Pressure (Pa) = The standard baseline pressure used in dB calculations
- 10^(dB/20) = Converts dB to a linear pressure value
Common Reference Pressures
| Tipo di misurazione | Reference Pressure (Pa) |
|---|---|
| Air (Sound Pressure Level, SPL) | 20 µPa (0.00002 Pa) |
| Water (Hydrophone Measurements) | 1 µPa (0.000001 Pa) |
| Industrial Acoustics | 1 Pa |
| Loudspeaker Calibration | Varies based on system |
Nota: The most common reference pressure is 20 µPa, qual è threshold of human hearing.
Reference Table – Common dB to Pressure Conversions
To make calculations easier, here is a table showing common sound pressure levels (SPL) and their equivalent pressure values:
| Sound Level (dB SPL) | Pressione (Pa) |
|---|---|
| 0 dB (Hearing Threshold) | 0.00002 Pa |
| 20 dB (Whisper) | 0.0002 Pa |
| 40 dB (Quiet Library) | 0.002 Pa |
| 60 dB (Normal Conversation) | 0.02 Pa |
| 80 dB (Busy Street) | 0.2 Pa |
| 100 dB (Jet Takeoff at 305m) | 2 Pa |
| 120 dB (Pain Threshold) | 20 Pa |
| 140 dB (Jet Engine at 30m) | 200 Pa |
Questa tabella fornisce una quick reference for common sound pressure levels, helping audio engineers, acousticians, and safety professionals stima intensità del suono in scenari del mondo reale.
Example of Db To Pressure Calculator
1. Convert 80 dB SPL to Pressure
Usando la formula:
Pressure (Pa) = 20 µPa × 10^(80 / 20)
Pressure (Pa) = 0.00002 × 10^(4) = 0.2 Pa
This means a sound a 80dB SPL corresponds to a pressure of 0.2 Pascal.
2. Convert 100 dB SPL to Pressure
Pressure (Pa) = 20 µPa × 10^(100 / 20)
Pressure (Pa) = 0.00002 × 10^(5) = 2 Pascal
This means a sound a 100dB SPL corrisponde 2 Pascals of pressure.
Domande frequenti più comuni
20 µPa is the threshold of human hearing in air, making it the standard reference pressure for misurazioni del livello di pressione sonora (SPL)..
At 120 dB SPL (20 Pa), sound becomes doloroso to humans. At 140 dB SPL (200 Pa), può causare danni permanenti all'udito.
Si ma use 1 µPa as the reference pressure invece di 20 µPa, since underwater sound measurements follow different acoustic standards.