- dB to Pressure Calculator 转换 decibel (dB) values into actual pressure 测量. Since decibels represent a 对数刻度, this tool helps in converting them into linear pressure units (Pascals, Pa)，常用于 acoustics, audio engineering, and physics.
This calculator is essential in:
- 声压级 (SPL) 测量 – 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
通过使用这个工具， engineers, sound technicians, and researchers 能够 interpret dB values in real-world pressure units.
Formula for Db To Pressure Calculator
建立 sound pressure is proportional to amplitude, we use the following equation:
通式
Pressure (Pa) = Reference Pressure × 10^(dB / 20)
地点：
- 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
| 测量类型 | Reference Pressure (Pa) |
|---|---|
| Air (Sound Pressure Level, SPL) | 20 µPa (0.00002 Pa) |
| Water (Hydrophone Measurements) | 1 µPa (0.000001 Pa) |
| Industrial Acoustics | 1霸 |
| Loudspeaker Calibration | Varies based on system |
请注意： The most common reference pressure is 20 微帕， 哪一个是 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) | 压力 (Pa) |
|---|---|
| 0 dB (Hearing Threshold) | 0.00002霸 |
| 20 dB (Whisper) | 0.0002霸 |
| 40 dB (Quiet Library) | 0.002霸 |
| 60 dB (Normal Conversation) | 0.02霸 |
| 80 dB (Busy Street) | 0.2霸 |
| 100 dB (Jet Takeoff at 305m) | 2霸 |
| 120 dB (Pain Threshold) | 20霸 |
| 140 dB (Jet Engine at 30m) | 200霸 |
该表提供了 quick reference for common sound pressure levels, helping audio engineers, acousticians, and safety professionals 评估 声强 in real-world scenarios.
Example of Db To Pressure Calculator
1. Convert 80 dB SPL to Pressure
使用公式：
Pressure (Pa) = 20 µPa × 10^(80 / 20)
Pressure (Pa) = 0.00002 × 10^(4) = 0.2霸
This means a sound at 80 dB SPL corresponds to a pressure of 0.2 帕斯卡.
2. Convert 100 dB SPL to Pressure
Pressure (Pa) = 20 µPa × 10^(100 / 20)
Pressure (Pa) = 0.00002 × 10^(5) = 2 帕斯卡
This means a sound at 100 dB SPL 对应于 2 Pascals of pressure.
最常见的常见问题解答
20 µPa is the threshold of human hearing in air, making it the standard reference pressure for 声压级 (SPL) 测量.
At 120 分贝声压级 (20 Pa), sound becomes 痛苦 to humans. At 140 分贝声压级 (200 Pa)，这可能会导致 永久性听力损伤.
对，但是 use 1 µPa as the reference pressure 而不是 20 微帕, since underwater sound measurements follow different acoustic standards.