This guide helps you easily convert between various sound pressure level units used in acoustics. Whether you're working with pascal (Pa) or decibel (dB) or Watts per square meter (W/m²), this tutorial provides the formulas and examples you need to make accurate conversions.
Formula: dB = 20 * log10(Pa / Pref)
Example: Convert 2 Pa to dB, with Pref = 20 µPa (reference pressure in air).
Solution: 20 * log10(2 / 0.00002) ≈ 93.98 dB
Formula: dB = 10 * log10(W/m² / Iref)
Example: Convert 1 W/m² to dB, with Iref = 1e-12 W/m² (reference intensity in air).
Solution: 10 * log10(1 / 1e-12) = 120 dB