இலவச பொறியியல் கருவி #216

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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.

SPL = 20·log₁₀(p/p₀)dB SPL ↔ PaUnweighted
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Sound Pressure
dB SPL
Sound Pressure

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
00.00002Hearing threshold
300.00063Quiet room
600.02Normal conversation
850.36Heavy traffic
941.01 Pascal reference
12020.0Pain threshold
140200.0Jet engine (close)
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