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  2. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    MIDI note Frequency (Hz) Description Sound file 0 8.17578125 Lowest organ note n/a (fundamental frequency inaudible) 12 16.3515625 Lowest note for tuba, large pipe organs, Bösendorfer Imperial grand piano n/a (fundamental frequency inaudible under average conditions) 24 32.703125 Lowest C on a standard 88-key piano: 36 65.40625 Lowest note for ...

  3. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    100 Hz 100 Hz: Cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm) 261.626 Hz: Acoustic – the musical note middle C (C 4) 440 Hz: Acoustic – concert pitch (A above middle C; A 4), used for tuning musical instruments 716 Hz: Rotational period of one of the fastest known millisecond pulsars, PSR J1748−2446ad [4] 10 3

  4. The Sound of Silence (2019 film) - Wikipedia

    en.wikipedia.org/wiki/The_Sound_of_Silence_(2019...

    The Sound of Silence is a 2019 American drama film directed by Michael Tyburski. It was screened in the U.S. Dramatic Competition section at the 2019 Sundance Film Festival. [2] The plot centers on Peter Lucian, played by Peter Sarsgaard, a "house tuner," working on the sonic environment of homes.

  5. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    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.

  6. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  7. Musical acoustics - Wikipedia

    en.wikipedia.org/wiki/Musical_acoustics

    For instance, a note vibrating at 200 Hz and a note vibrating at 300 Hz (a perfect fifth, or ⁠ 3 / 2 ⁠ ratio, above 200 Hz) add together to make a wave that repeats at 100 Hz: Every ⁠ 1 / 100 ⁠ of a second, the 300 Hz wave repeats three times and the 200 Hz wave repeats twice. Note that the combined wave repeats at 100 Hz, even though ...

  8. 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.

  9. Reference tone - Wikipedia

    en.wikipedia.org/wiki/Reference_tone

    In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.