Recognised as Musical note

A8

A8 is MIDI note 117, sounding at 7,040 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 0.0487 m, and it sits in octave 8.

Pitch

Scientific pitch notationA8

MIDI note number117

Frequency7,040 Hzequal temperament, A4 = 440 Hz, a convention rather than a constant

Pitch classA (9)

Octave8

Wavelength in air0.0487 mat 343 m/s, dry air at 20 °C

Period0.142 ms

Frequency one octave up14,080 Hzdoubling the frequency

Frequency one octave down3,520 Hz

AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age

Perfect fifth belowD8 · 4,698.64 Hz

Perfect fifth aboveE9 · 10,548.08 Hz

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