Preset
Tuning Fork
Δf = 1 Hz — one beat per second
Piano Tuning
Δf = 3 Hz — classic pitch beating
Fast Beat
Δf = 7 Hz — rapid amplitude swing
Unequal Amps
A₁ ≠ A₂ — incomplete cancellation
Unison
f₁ = f₂ — full reinforcement
Frequency f₁ (Hz)
9.0
Frequency f₂ (Hz)
10.0
Amplitude A₁
1.00
Amplitude A₂
1.00
Time window (s)
3.0
≈ Envelope
⏸ Pause
↺ Reset
Two nearby frequencies
produce a pulsing beat at
rate |f₁ − f₂| per second.
f₁:
9.0
Hz
f₂:
10.0
Hz
f
beat
:
1.0
Hz
T
beat
:
1.000
s
t:
0.00
s
y = A₁sin(2πf₁t) + A₂sin(2πf₂t)
Sliders
— adjust frequencies & amplitudes
Envelope
— toggle beat envelope display
Space
— pause / play