இலவச பொறியியல் கருவி #216
ஒலி நிலை மாற்றி
Convert between unweighted sound pressure level (dB SPL) and sound pressure (Pa). Enter a value in either unit and get an instant conversion. Note: A-weighted levels in dB(A) are not directly convertible to Pa.
Results
Sound Pressure Level
இங்கு p₀ = 20 μPa = 2 × 10⁻⁵ Pa (கேட்கும் வரம்பு)
A Note on dB(A)
This converter works with unweighted sound pressure levels (dB SPL). An A-weighted level, dB(A), applies a frequency-dependent correction curve that approximates human hearing sensitivity. Because the correction varies with frequency, a single dB(A) value cannot be converted to sound pressure in Pa without knowing the frequency spectrum of the sound. Do not enter dB(A) readings into this tool expecting an exact pressure value.
Common Sound Levels
| Level (dB) | Pressure (Pa) | Example |
|---|---|---|
| 0 | 0.00002 | Hearing threshold |
| 30 | 0.00063 | Quiet room |
| 60 | 0.02 | Normal conversation |
| 85 | 0.36 | Heavy traffic |
| 94 | 1.0 | 1 Pascal reference |
| 120 | 20.0 | Pain threshold |
| 140 | 200.0 | Jet engine (close) |
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