Question 1

What is A440 tuning?

Accepted Answer

A440 means the note A above middle C vibrates at 440 Hz. This is the international standard pitch. Other notes are calculated using equal temperament: each semitone = frequency × 2^(1/12).

Question 2

How do I find the frequency of any note?

Accepted Answer

From A4 (440 Hz): frequency = 440 × 2^(n/12), where n = semitones from A4. Middle C (C4) is -9 semitones = 261.6 Hz. C5 is +3 = 523.3 Hz.

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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