Question 1

What sound units are used in different fields?

Accepted Answer

Physics: pascals, watts. Audio: dB SPL, dBm, dBu. Acoustics: phons, sones (perceived loudness). Noise regulations: dBA, Leq (equivalent continuous level), OSHA limits.

Question 2

What is the difference between sound intensity and pressure?

Accepted Answer

Intensity (W/m²) is power per area. Pressure (Pa) is force per area. Intensity ∝ pressure². Both are used in dB scales but with different references (10^-12 W/m² vs 20 μPa).

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.

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