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For many years, there was no pitch standard across Europe. The frequency of a ′ (the standard note for tuning musical instruments), for example, could range from a ′ =392 Hz in parts of France to a ′ =465 Hz (Cornet-ton pitch) in parts of Germany. [1] [2] Organs were often tuned differently than ensembles, even within the same region or town.
A440 (also known as Stuttgart pitch [1]) is the musical pitch corresponding to an audio frequency of 440 Hz, which serves as a tuning standard for the musical note of A above middle C, or A 4 in scientific pitch notation.
A440 Play ⓘ. 440 Hz = 4.21 or 4.39. The Bark scale is a psychoacoustical scale proposed by Eberhard Zwicker in 1961. It is named after Heinrich Barkhausen, who proposed the first subjective measurements of loudness. [1] One definition of the term is "a frequency scale on which equal distances correspond with perceptually equal distances.
This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1] [2] Every octave is made of twelve steps called semitones.
A 4 is closer to 430 Hz than to the western standard (440 Hz), and intervals are in just intonation and not equal temperament. In some tunings alternate choices are available for strings 6 and 11 (indicated with a slash); whatever note is chosen these strings are always tuned one octave apart. Krachappi: 4 strings 2 courses. F 2 F 2 • B 2 B 2
The initial standard was A = 439 Hz ⓘ, but this was superseded by A = 440 Hz, possibly because 439 Hz was difficult to reproduce in a laboratory since 439 is a prime number. [ 22 ] In 1964, of 31 top professional U.S. orchestras, 19 were tuning at 440, the others at 441 or 442. [ 23 ]
All signals in the specification use combination (by addition) of audible tones of four frequencies: 350 Hz, 440 Hz, 480 Hz, and 620 Hz. Equipment is required to maintain tolerances within ± 0.5% in frequency and ±1.5 dB in amplitude stability. Harmonic distortion is to be at least 30 dB below the applied tone level. [1] The tones are as ...
An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz.
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