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The Spokane commercial district. The economy of the Spokane metropolitan area plays a vital role as the hub for the commercial, manufacturing, and transportation center as well as the medical, shopping, and entertainment hub of the 80,000 square miles (210,000 km 2) Inland Northwest region.
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. It is standardized by the International Organization for Standardization as ISO 16.
Scientific pitch, also known as philosophical pitch, Sauveur pitch or Verdi tuning, is an absolute concert pitch standard which is based on middle C (C 4) being set to 256 Hz rather than ~ 261.63 Hz, [a] making it ~ 31.77 cents lower than the common A440 pitch standard.
For standard A440 pitch equal temperament, the system begins at a frequency of 16.35160 Hz, which is assigned the value C 0. The octave 0 of the scientific pitch notation is traditionally called the sub-contra octave , and the tone marked C 0 in SPN is written as ,,C or C,, or CCC in traditional systems, such as Helmholtz notation .
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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.
Saxophones tuned to A=440 Hz would be marked 'L', 'LP' or 'Low Pitch' A 1927 Conn New Wonder Series 2 alto saxophone marked 'H' for 'High Pitch' (A=456 Hertz) Rising pitch put a strain on singers' voices and, largely due to their protests, the French government passed a law on February 16, 1859 setting the A above middle C at 435 Hz, 435 Hz ⓘ .
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