Question 1

What is dB SPL and how does it relate to pascals?

Accepted Answer

dB SPL (Sound Pressure Level) is referenced to 20 micropascals (threshold of hearing). 0 dB SPL = 20 μPa. Each +20 dB = 10× pressure. 94 dB SPL = 1 pascal.

Question 2

What are typical sound pressure levels?

Accepted Answer

Whisper: 30 dB (0.0006 Pa). Normal speech: 60 dB (0.02 Pa). Loud music: 100 dB (2 Pa). Jet takeoff: 140 dB (200 Pa). Pain threshold: ~130 dB.

Question 3

How do decibels work?

Accepted Answer

Decibels are logarithmic: +3 dB doubles power, +10 dB sounds twice as loud. 20 dB = whisper, 60 dB = conversation, 100 dB = concerts, 140 dB = pain threshold.

Question 4

What's the relationship between frequency and pitch?

Accepted Answer

Frequency directly determines pitch. A4 = 440 Hz. Each octave doubles frequency. Our hearing ranges from 20 Hz to 20,000 Hz.

Db spl to Pascals Sound Converter - Free Online Tool

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