Recognised as Musical note
A#7
- A#7
- 3,729.31 Hz
- MIDI 106
A#7 (enharmonically Bb7) is MIDI note 106, sounding at 3,729.31 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 0.092 m, and it sits in octave 7.
Pitch
Scientific pitch notationA#7
Enharmonic equivalentBb7the same pitch in equal temperament, spelled differently
MIDI note number106
Pitch classA# (10)
Octave7
As a sound wave
Wavelength in air0.092 mat 343 m/s, dry air at 20 °C
Period0.2681 ms
Frequency one octave down1,864.655 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowA#6 · 1,864.66 Hz
Perfect fifth belowD#7 · 2,489.02 Hz
Semitone belowA7 · 3,520 Hz
Semitone aboveB7 · 3,951.07 Hz
Major third aboveD8 · 4,698.64 Hz
Perfect fifth aboveF8 · 5,587.65 Hz
Octave aboveA#8 · 7,458.62 Hz
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Also reads as
NOTeAsHArP7 (chemical formula)
- Formula
- 490.304 g/mol
- 13 atoms
NOTeAsHArP7 has a molar mass of 490.304 g/mol, made up of 13 atoms across 7 elements: 1 × N, 1 × O, 1 × Te, 1 × As, 1 × H, 1 × Ar, 7 × P.
Molar mass
Molar mass490.304 g/mol
Total atoms per molecule13
Distinct elements7
Mass of one molecule8.1416895 × 10^-22 g
Molecules per gram1.2282463 × 10^21
Composition by mass
N2.9%
O3.3%
Te26%
As15.3%
H0.2%
Ar8.1%
P44.2%
Nitrogen (N)14.007 g/mol, 2.857%
Oxygen (O)15.999 g/mol, 3.263%
Tellurium (Te)127.6 g/mol, 26.025%
Arsenic (As)74.922 g/mol, 15.281%
Hydrogen (H)1.008 g/mol, 0.206%
Argon (Ar)39.95 g/mol, 8.148%
Phosphorus (P × 7)216.818 g/mol, 44.221%
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