dB level references in acoustics: a cheat sheet
When working in the field of acoustics, one of the essential tasks faced by acoustic engineers is converting linear-scaled data into the decibel (dB) scale. Whether it's understanding sound pressure levels or analyzing the intensity of sound, having a clear dB reference is crucial for accurate calculations. In this blog post, we'll provide you with a concise table that serves as an invaluable tool for anyone needing to perform these conversions. Are you often finding yourself searching for "sound pressure dB reference" or "sound intensity dB level unit"? Look no further.
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| Quantity | dB level reference | Unit |
| Acceleration | 1x10-6 | m/s2 |
| Acoustic Particle Velocity | 50x10-9 | m/s |
| Energy density | 1x10-12 | J/m3 |
| Force | 1x10-6 | N |
| Sound Intensity | 1x10-12 | W/m2 |
| Sound Power | 1x10-12 | W |
| Sound Pressure | 20x10-6 | Pa |
| Specific Acoustic Admittance | 2.5x10-3 | m/(Pa·s) |
| Specific Acoustic Impedance | 400 | Pa·s/m |
| Surface Velocity | 1x10-9 | m/s |
| Surface Displacement | 1x10-12 | m |