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 A329211 Decimal expansion of the fundamental frequency of the note E4 in hertz. 11
 3, 2, 9, 6, 2, 7, 5, 5, 6, 9, 1, 2, 8, 6, 9, 9, 2, 9, 7, 3, 5, 8, 4, 1, 7, 6, 1, 0, 4, 6, 5, 5, 5, 0, 7, 5, 1, 8, 6, 4, 7, 3, 3, 4, 1, 8, 2, 0, 9, 8, 4, 3, 1, 2, 8, 1, 7, 0, 2, 5, 2, 4, 5, 7, 0, 3, 1, 3, 4, 6, 9, 6, 0, 7, 2, 3, 8, 2, 1, 1, 8, 5, 5, 2, 0, 3, 0, 9, 5, 5, 3 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS In 12-tone equal temperament, when A4 (the fifth A on the Piano keyboard) is tuned to 440 Hz, the frequency of the note E4 (5 semitones below A4) is 440*2^(-5/12) Hz = 329.6 Hz. Also the frequency of the first string of a guitar when standard tuning is used. LINKS Table of n, a(n) for n=3..93. Wikipedia, Piano key frequencies Index entries for sequences based on music FORMULA Equals 220 * 2^(7/12). EXAMPLE Frequencies of notes in an octave (Hz): >-------------------------------------------------- | | C4 261.6255653005... (A329207) | +--------------------------------------- >----------| C#4/Db4 277.1826309768... (A329208) | +--------------------------------------- | D4 293.6647679174... (A329209) | +--------------------------------------- >----------| D#4/Eb4 311.1269837220... (this seq) | +--------------------------------------- | E4 329.6275569128... (A329211) | >-------------------------------------------------- | | F4 349.2282314330... (A329212) | +--------------------------------------- >----------| F#4/Gb4 369.9944227116... (A329213) | +--------------------------------------- | G4 391.9954359817... (A329214) | +--------------------------------------- >----------| G#4/Ab4 415.3046975799... (A329215) | +--------------------------------------- | A4 440.0000000000 | +--------------------------------------- >----------| A#4/Bb4 466.1637615180... (A329217) | +--------------------------------------- | B4 493.8833012561... (A329218) | >-------------------------------------------------- [New layout from Jon E. Schoenfield, Nov 08 2019] PROG (PARI) default(realprecision, 100); 440 * 2^(-5/12) CROSSREFS See the Example section above for the fundamental frequency of some other notes. Sequence in context: A228323 A350831 A140590 * A164279 A289053 A191539 Adjacent sequences: A329208 A329209 A329210 * A329212 A329213 A329214 KEYWORD nonn,easy,cons AUTHOR Jianing Song, Nov 08 2019 STATUS approved

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Last modified June 8 10:57 EDT 2023. Contains 363164 sequences. (Running on oeis4.)