sound Conversion Calculator

The main sound measurement units are: 1) Decibel (dB) - logarithmic sound pressure level, 2) dBA - A-weighted decibels for human hearing, 3) Pascal (Pa) - sound pressure, 4) Phon - loudness level relative to frequency, 5) Sone - linear perceived loudness, 6) Watt/m² - sound intensity.

Decibel conversions include: 1) dB SPL to dBA using frequency weighting curves, 2) dB = 20 × log₁₀(P/P₀) for pressure ratio, 3) dB = 10 × log₁₀(W/W₀) for power ratio, 4) Add 3 dB for doubling sound intensity, 5) Subtract 6 dB for doubling distance from source.

Common sound levels are: 1) Whisper: 30 dBA, 2) Normal conversation: 60 dBA, 3) City traffic: 80 dBA, 4) Power tools: 100 dBA, 5) Rock concert: 110 dBA, 6) Jet engine: 140 dBA, 7) Pain threshold: 120-130 dBA, 8) Workplace safety limit: 85 dBA for 8 hours.

Sound pressure and intensity relationships: 1) Intensity ∝ pressure², 2) Intensity decreases with square of distance, 3) 6 dB decrease per distance doubling for pressure, 4) 3 dB decrease per area doubling for intensity, 5) Power = intensity × area, 6) Reference pressure P₀ = 20 µPa.