Question 1

What is the audible frequency range?

Accepted Answer

Human hearing: 20 Hz to 20,000 Hz (20 kHz). Bass: 20-250 Hz. Midrange: 250-4,000 Hz. Treble: 4,000-20,000 Hz. Infrasound is below 20 Hz; ultrasound is above 20 kHz.

Question 2

Why does audio quality matter with frequency?

Accepted Answer

CD quality samples at 44.1 kHz (captures up to 22 kHz). Phone calls: 300-3400 Hz (adequate for voice). High-res audio: 96+ kHz. Higher sample rates capture more detail and prevent aliasing.

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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