Sound, light and signal.聲 · 光 · 訊
A notebook kept beside the flugelhorn and the keyboard, where three physical subjects are drawn at the same scale. Nothing here is fast on purpose; the point is measurement, slowly.
Chapters
Three explorers · one methodAcoustics
Build a brass tone from eight partials and listen to the arithmetic. Integer multiples, a conical bore, and why the low harmonics carry the colour.
02Spectra
Slide a filament from candlelight to overcast noon. Colour temperature, Wien’s law, and an honest note about how poorly sRGB translates a blackbody.
03Signals
Sample a slow sine until it lies to you. Aliasing is not blur but folding: a five-hertz tone, sampled badly, returns as a different, confident ghost.
Current
State of the benchRe-tuning the interference field so the wave sources drift instead of orbit; it reads calmer at thirty frames a second.
The 233 Hz floor — what the pedal B♭ teaches about rooms you have stopped hearing.
002 · OCT 2026 — six pages, one static folder, no trackers. The hero plot is recomputed on every frame; the two dials that matter are labelled in hertz and kelvin.
Every page on this site is an instrument: hold a control, move it slowly, and let the physics answer before the words do.