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2. A440 (pitch standard) - Wikipedia

   en.wikipedia.org/wiki/A440_(pitch_standard)

   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.

3. Scientific pitch - Wikipedia

   en.wikipedia.org/wiki/Scientific_pitch

   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.

4. Pitch (music) - Wikipedia

   en.wikipedia.org/wiki/Pitch_(music)

   Pitch depends to a lesser degree on the sound pressure level (loudness, volume) of the tone, especially at frequencies below 1,000 Hz and above 2,000 Hz. The pitch of lower tones gets lower as sound pressure increases. For instance, a tone of 200 Hz that is very loud seems one semitone lower in pitch than if it is just barely audible.

5. Prognostic chart - Wikipedia

   en.wikipedia.org/wiki/Prognostic_chart

   A prognostic chart is a map displaying the likely weather forecast for a future time. Such charts generated by atmospheric models as output from numerical weather prediction and contain a variety of information such as temperature , wind , precipitation and weather fronts .

6. Scientific pitch notation - Wikipedia

   en.wikipedia.org/wiki/Scientific_pitch_notation

   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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8. Concert pitch - Wikipedia

   en.wikipedia.org/wiki/Concert_pitch

   In England the term low pitch was used from 1896 onward to refer to the new Philharmonic Society tuning standard of A = 439 Hz at 68 °F (20 °C), while "high pitch" was used for the older tuning of A = 452.4 Hz at 60 °F (16 °C). Although the larger London orchestras were quick to conform to the new low pitch, provincial orchestras continued ...

9. Why Hertz Stock Is Higher Today - AOL

   www.aol.com/why-hertz-stock-higher-today...

   The rental car giant's shares are reliving a bit of their 2021 glory today. But recent troubles don't inspire confidence in the rally. Why Hertz Stock Is Higher Today