v1.6.0

Zwicker tone

Notch broadband noise, cycle it on and off, and hear a faint after-tone linger in the silence where the notch was.

npx web-audio-api zwicker-tone 2000 3 2 20s
freq=<hz>
notch center frequency
on=<s>
noise-on duration
off=<s>
silence duration
-d, --duration <time>
run time (CLI accepts s/m/h suffixes; default: 20s)
ready

Other examples

11Shepard toneLayer octave-spaced voices to create a pitch that appears to rise or fall forever.Explore 12Risset rhythmLayer tempo cycles to create a beat that appears to accelerate or decelerate forever.Explore 13Binaural beatsSend nearby frequencies to opposite ears and hear their difference.Explore 14Missing fundamentalPlay harmonics 2–6 while omitting the pitch the listener still perceives.Explore

This renders the Zwicker tone, an auditory afterimage: broadband noise with a notch cut out of it is switched on and off, and a faint tone lingers in the silence where the notch was. It is best heard in the browser in a quiet room, or rendered from the Node CLI for closer inspection.