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Pulse: How Fast Does a Body Move?

🌐 public · created AE561022 (22.10.2026) · open in the standard editor view · 📽 open as presentation

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root/ baumhaus.digital/ Klasse Leben/ WiSeAE56/ On Tracking : Dancing Piano II./ Pulse: How Fast Does a Body Move?

Descendants (at least 15 branches originate here)

  • Pulse: How Fast Does a Body Move?
    • is_parent Welcome: Movement Has a Pulse ·
      Every movement, however free it looks, has a pulse. A step, a swing of the arm, a beat of a wing — each repeats, and each repetition takes time.This sessi
    • is_parent Period and Frequency ·
      A period (T) is the time it takes for one complete cycle of a repeating motion — one full step, one full wingbeat, one full swing.Frequency (f) is simply
    • is_parent The Pendulum: A Clock Made of Motion ·
      The simplest periodic body in physics is the pendulum: a weight swinging from a fixed point.Its period depends only on its length and on gravity — not on
    • is_parent The Heartbeat: Your Own Metronome ·
      The most intimate periodic motion you own is your own heart: roughly one beat per second at rest — about 60-80 beats per minute, close to 1 Hz.Under exert
    • is_parent Walking: Cadence and Stride ·
      Walking is periodic too: dancers and gait researchers alike call its frequency cadence — steps per minute. A relaxed walk sits around 100-120 steps/min, r
    • is_parent Running and Sprinting: Frequency Is Not Speed ·
      Speed is frequency multiplied by how far each cycle carries you — its amplitude, or in gait terms, the stride length.Sprinters increase both: a faster leg
    • is_parent Why Small Creatures Move Faster ·
      Remember the pendulum: a longer pendulum swings more slowly. The same logic applies to limbs and wings, which behave like pendulums built out of muscle and bone
    • is_parent Extremes in the Animal Kingdom ·
      A hummingbird's wings beat around 50 times per second (50 Hz) — fast enough to hover motionless in the air.A housefly's wings beat even faster, well above
    • is_parent The Piano String Analogy ·
      A piano string is, again, a pendulum in disguise — just a vibrating one instead of a swinging one.Short, thin, tightly-strung strings (the piano's high no
    • is_parent Tempo in Music: BPM as Period ·
      Music names the same quantity differently: tempo, measured in beats per minute (BPM).A tempo of 120 BPM means one beat every 0.5 seconds — a period of hal
    • is_parent Entrainment: When the Body Syncs to the Beat ·
      Entrainment is what happens when an independent periodic body — a footstep, a heartbeat, a swinging arm — locks its own frequency onto an external o
    • is_parent Tracking the Untrackable ·
      Measuring a heartbeat or a pendulum is easy. Measuring a dancer's full-body period, in real time, on stage, is not — which is exactly the technical proble
    • is_parent From Movement to Sound ·
      Once a movement's frequency is captured as a number, it can be mapped — frequency to pitch, amplitude to volume, period to rhythm — onto a piano, re
    • is_parent Closing: What's Next ·
      Today's vocabulary — period, frequency, amplitude, speed, entrainment — is the physical foundation for everything that follows in this course.Next s
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