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  2. Orders of magnitude (frequency) - Wikipedia

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

    His vocal cords vibrate 1 time every 5.29 seconds. 10 0: 1 hertz (Hz) 1 to 1.66 Hz: Approximate frequency of an adult human's resting heart beat: 1 Hz: 60 bpm, common tempo in music 2 Hz: 120 bpm, common tempo in music ~7.83 Hz: Fundamental frequency of the Schumann resonances: 10 1: 10 hertz 10 Hz

  3. 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.

  4. Refresh rate - Wikipedia

    en.wikipedia.org/wiki/Refresh_rate

    However, the lower refresh rate of 50 Hz introduces more flicker, so sets that use digital technology to double the refresh rate to 100 Hz are now very popular. (see Broadcast television systems ) Another difference between 50 Hz and 60 Hz standards is the way motion pictures (film sources as opposed to video camera sources) are transferred or ...

  5. Frame rate - Wikipedia

    en.wikipedia.org/wiki/Frame_rate

    Video games designed for PAL markets, before the sixth generation of video game consoles, had lower frame rates by design due to the 50 Hz output. This noticeably made fast-paced games, such as racing or fighting games, run slower. [20] Computer monitors marketed to competitive PC gamers can hit 360 Hz, 500 Hz, or more. [21]

  6. Harmonic series (music) - Wikipedia

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

    For example, a perfect fifth, say 200 and 300 Hz (cycles per second), causes a listener to perceive a combination tone of 100 Hz (the difference between 300 Hz and 200 Hz); that is, an octave below the lower (actual sounding) note. This 100 Hz first-order combination tone then interacts with both notes of the interval to produce second-order ...

  7. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    One hundredth of a second. decisecond: 10 −1 s: One tenth of a second. second: 1 s: SI base unit for time. decasecond: 10 s: Ten seconds (one sixth of a minute) minute: 60 s: hectosecond: 100 s: milliday: 1/1000 d (0.001 d) 1.44 minutes, or 86.4 seconds. Also marketed as a ".beat" by the Swatch corporation. moment: 1/40 solar hour (90 s on ...

  8. Sensurround - Wikipedia

    en.wikipedia.org/wiki/Sensurround

    For program sounds applied to the Sensurround Horns, the composite mono soundtrack was used, with its volume and timing regulated by the 25 Hz control tone. 70mm 6-Track Magnetic Stereo: The Sensurround Control Tones were recorded on Tracks 2 and 4 and are 100 Hz instead of 25 Hz and 35 Hz. This was because the magnetic system could not ...

  9. Cycle per second - Wikipedia

    en.wikipedia.org/wiki/Cycle_per_second

    The cycle per second is a once-common English name for the unit of frequency now known as the hertz (Hz). Cycles per second may be denoted by c.p.s., c/s, or, ambiguously, just "cycles" (Cyc., Cy., C, or c). The term comes from repetitive phenomena such as sound waves having a frequency measurable as a number of oscillations, or cycles, per ...